Android: Convert more legacy JNI calls to Proxy Natives

Hopefully this is the last batch

Bug: 1407278
Change-Id: Ic82a056d8bb6631ffdd39426d63ad92bbe05abeb
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4174393
Reviewed-by: Sam Maier <smaier@chromium.org>
Commit-Queue: Andrew Grieve <agrieve@chromium.org>
Owners-Override: Andrew Grieve <agrieve@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1093528}

chrome/android/javatests/src/org/chromium/chrome/browser/offlinepages/OfflineTestUtil.java

@@ -10,6 +10,7 @@ import org.junit.Assert;
 
 import org.chromium.base.Callback;
 import org.chromium.base.annotations.JNINamespace;
+import org.chromium.base.annotations.NativeMethods;
 import org.chromium.base.task.PostTask;
 import org.chromium.base.test.util.CallbackHelper;
 import org.chromium.base.test.util.CriteriaHelper;
@@ -31,7 +32,8 @@ import java.util.concurrent.atomic.AtomicReference;
 public class OfflineTestUtil {
     // Forces request coordinator to process the requests in the queue.
     public static void startRequestCoordinatorProcessing() {
-        TestThreadUtils.runOnUiThreadBlocking(() -> nativeStartRequestCoordinatorProcessing());
+        TestThreadUtils.runOnUiThreadBlocking(
+                () -> OfflineTestUtilJni.get().startRequestCoordinatorProcessing());
     }
 
     // Gets all the URLs in the request queue.
@@ -39,7 +41,7 @@ public class OfflineTestUtil {
         final AtomicReference<SavePageRequest[]> result = new AtomicReference<>();
         final CallbackHelper callbackHelper = new CallbackHelper();
         TestThreadUtils.runOnUiThreadBlocking(() -> {
-            nativeGetRequestsInQueue((SavePageRequest[] requests) -> {
+            OfflineTestUtilJni.get().getRequestsInQueue((SavePageRequest[] requests) -> {
                 result.set(requests);
                 callbackHelper.notifyCalled();
             });
@@ -54,10 +56,11 @@ public class OfflineTestUtil {
                 new AtomicReference<List<OfflinePageItem>>();
         final CallbackHelper callbackHelper = new CallbackHelper();
         TestThreadUtils.runOnUiThreadBlocking(() -> {
-            nativeGetAllPages(new ArrayList<OfflinePageItem>(), (List<OfflinePageItem> items) -> {
-                result.set(items);
-                callbackHelper.notifyCalled();
-            });
+            OfflineTestUtilJni.get().getAllPages(
+                    new ArrayList<OfflinePageItem>(), (List<OfflinePageItem> items) -> {
+                        result.set(items);
+                        callbackHelper.notifyCalled();
+                    });
         });
         callbackHelper.waitForCallback(0);
         return result.get();
@@ -69,7 +72,7 @@ public class OfflineTestUtil {
         final CallbackHelper callbackHelper = new CallbackHelper();
         final AtomicReference<String> result = new AtomicReference<String>();
         TestThreadUtils.runOnUiThreadBlocking(() -> {
-            nativeDumpRequestCoordinatorState((String dump) -> {
+            OfflineTestUtilJni.get().dumpRequestCoordinatorState((String dump) -> {
                 result.set(dump);
                 callbackHelper.notifyCalled();
             });
@@ -108,7 +111,7 @@ public class OfflineTestUtil {
         final AtomicReference<byte[]> result = new AtomicReference<>();
         final CallbackHelper callbackHelper = new CallbackHelper();
         TestThreadUtils.runOnUiThreadBlocking(() -> {
-            nativeGetRawThumbnail(offlineId, (byte[] rawThumbnail) -> {
+            OfflineTestUtilJni.get().getRawThumbnail(offlineId, (byte[] rawThumbnail) -> {
                 result.set(rawThumbnail);
                 callbackHelper.notifyCalled();
             });
@@ -147,21 +150,24 @@ public class OfflineTestUtil {
     public static void interceptWithOfflineError(String url) throws TimeoutException {
         final CallbackHelper callbackHelper = new CallbackHelper();
         TestThreadUtils.runOnUiThreadBlocking(() -> {
-            nativeInterceptWithOfflineError(url, () -> callbackHelper.notifyCalled());
+            OfflineTestUtilJni.get().interceptWithOfflineError(
+                    url, () -> callbackHelper.notifyCalled());
         });
         callbackHelper.waitForCallback(0);
     }
 
     // Clears all previous intercepts installed by interceptWithOfflineError.
     public static void clearIntercepts() {
-        TestThreadUtils.runOnUiThreadBlocking(() -> nativeClearIntercepts());
+        TestThreadUtils.runOnUiThreadBlocking(() -> OfflineTestUtilJni.get().clearIntercepts());
     }
 
     // Waits for the connectivity state to change in the native network change notifier.
     public static void waitForConnectivityState(boolean connected) {
         AtomicBoolean done = new AtomicBoolean();
         TestThreadUtils.runOnUiThreadBlocking(
-                () -> nativeWaitForConnectivityState(connected, () -> done.set(true)));
+                ()
+                        -> OfflineTestUtilJni.get().waitForConnectivityState(
+                                connected, () -> done.set(true)));
         CriteriaHelper.pollInstrumentationThread(() -> done.get());
     }
 
@@ -169,22 +175,26 @@ public class OfflineTestUtil {
     // also ensures that the server-enabled check is due.
     public static void setPrefetchingEnabledByServer(boolean enabled) {
         TestThreadUtils.runOnUiThreadBlocking(
-                () -> { nativeSetPrefetchingEnabledByServer(enabled); });
+                () -> { OfflineTestUtilJni.get().setPrefetchingEnabledByServer(enabled); });
     }
 
     public static void setGCMTokenForTesting(String gcmToken) {
-        TestThreadUtils.runOnUiThreadBlocking(() -> { nativeSetGCMTokenForTesting(gcmToken); });
+        TestThreadUtils.runOnUiThreadBlocking(
+                () -> { OfflineTestUtilJni.get().setGCMTokenForTesting(gcmToken); });
     }
 
-    private static native void nativeGetRequestsInQueue(Callback<SavePageRequest[]> callback);
-    private static native void nativeGetAllPages(
-            List<OfflinePageItem> offlinePages, final Callback<List<OfflinePageItem>> callback);
-    private static native void nativeGetRawThumbnail(long offlineId, Callback<byte[]> callback);
-    private static native void nativeStartRequestCoordinatorProcessing();
-    private static native void nativeInterceptWithOfflineError(String url, Runnable readyRunnable);
-    private static native void nativeClearIntercepts();
-    private static native void nativeDumpRequestCoordinatorState(Callback<String> callback);
-    private static native void nativeWaitForConnectivityState(boolean connected, Runnable callback);
-    private static native void nativeSetPrefetchingEnabledByServer(boolean enabled);
-    private static native void nativeSetGCMTokenForTesting(String gcmToken);
+    @NativeMethods
+    interface Natives {
+        void getRequestsInQueue(Callback<SavePageRequest[]> callback);
+        void getAllPages(
+                List<OfflinePageItem> offlinePages, final Callback<List<OfflinePageItem>> callback);
+        void getRawThumbnail(long offlineId, Callback<byte[]> callback);
+        void startRequestCoordinatorProcessing();
+        void interceptWithOfflineError(String url, Runnable readyRunnable);
+        void clearIntercepts();
+        void dumpRequestCoordinatorState(Callback<String> callback);
+        void waitForConnectivityState(boolean connected, Runnable callback);
+        void setPrefetchingEnabledByServer(boolean enabled);
+        void setGCMTokenForTesting(String gcmToken);
+    }
 }

chrome/android/javatests/src/org/chromium/chrome/browser/offlinepages/prefetch/PrefetchTestBridge.java

@@ -5,27 +5,32 @@
 package org.chromium.chrome.browser.offlinepages.prefetch;
 
 import org.chromium.base.annotations.JNINamespace;
+import org.chromium.base.annotations.NativeMethods;
 
 /** Prefetch test Java to native bridge. */
 @JNINamespace("offline_pages::prefetch")
 public class PrefetchTestBridge {
     public static void enableLimitlessPrefetching(boolean enabled) {
-        nativeEnableLimitlessPrefetching(enabled);
+        PrefetchTestBridgeJni.get().enableLimitlessPrefetching(enabled);
     }
     public static boolean isLimitlessPrefetchingEnabled() {
-        return nativeIsLimitlessPrefetchingEnabled();
+        return PrefetchTestBridgeJni.get().isLimitlessPrefetchingEnabled();
     }
     public static void insertIntoCachedImageFetcher(String url, byte[] imageData) {
-        nativeInsertIntoCachedImageFetcher(url, imageData);
+        PrefetchTestBridgeJni.get().insertIntoCachedImageFetcher(url, imageData);
     }
     public static void addCandidatePrefetchURL(String url, String title, String thumbnailUrl,
             String faviconUrl, String snippet, String attribution) {
-        nativeAddCandidatePrefetchURL(url, title, thumbnailUrl, faviconUrl, snippet, attribution);
+        PrefetchTestBridgeJni.get().addCandidatePrefetchURL(
+                url, title, thumbnailUrl, faviconUrl, snippet, attribution);
     }
 
-    static native void nativeEnableLimitlessPrefetching(boolean enabled);
-    static native boolean nativeIsLimitlessPrefetchingEnabled();
-    static native void nativeInsertIntoCachedImageFetcher(String url, byte[] imageData);
-    static native void nativeAddCandidatePrefetchURL(String url, String title, String thumbnailUrl,
-            String faviconUrl, String snippet, String attribution);
+    @NativeMethods
+    interface Natives {
+        void enableLimitlessPrefetching(boolean enabled);
+        boolean isLimitlessPrefetchingEnabled();
+        void insertIntoCachedImageFetcher(String url, byte[] imageData);
+        void addCandidatePrefetchURL(String url, String title, String thumbnailUrl,
+                String faviconUrl, String snippet, String attribution);
+    }
 }

chrome/android/javatests/src/org/chromium/chrome/browser/query_tiles/QueryTileFakeServer.java

@@ -5,6 +5,7 @@
 package org.chromium.chrome.browser.query_tiles;
 
 import org.chromium.base.Callback;
+import org.chromium.base.annotations.NativeMethods;
 
 /**
  * Spins up a test server and starts serving query tiles in native.
@@ -19,9 +20,13 @@ public class QueryTileFakeServer {
      */
     public static void setupFakeServer(
             int levels, int tilesPerLevel, Callback<Boolean> onFetchCompletedCallback) {
-        nativeSetupFakeServer(onFetchCompletedCallback, levels, tilesPerLevel);
+        QueryTileFakeServerJni.get().setupFakeServer(
+                onFetchCompletedCallback, levels, tilesPerLevel);
     }
 
-    static native void nativeSetupFakeServer(
-            Callback<Boolean> onFetchCompletedCallback, int levels, int tilesPerLevel);
+    @NativeMethods
+    interface Natives {
+        void setupFakeServer(
+                Callback<Boolean> onFetchCompletedCallback, int levels, int tilesPerLevel);
+    }
 }

chrome/android/javatests/src/org/chromium/chrome/browser/subresource_filter/TestRulesetPublisher.java

@@ -5,6 +5,7 @@
 package org.chromium.chrome.browser.subresource_filter;
 
 import org.chromium.base.annotations.CalledByNative;
+import org.chromium.base.annotations.NativeMethods;
 
 /**
  * Class which aids in publishing test rulesets for SubresourceFilter instrumentation tests.
@@ -14,7 +15,8 @@ public final class TestRulesetPublisher {
     private boolean mPublished;
 
     public void createAndPublishRulesetDisallowingSuffixForTesting(String suffix) {
-        nativeCreateAndPublishRulesetDisallowingSuffixForTesting(suffix);
+        TestRulesetPublisherJni.get().createAndPublishRulesetDisallowingSuffixForTesting(
+                this, suffix);
     }
 
     public boolean isPublished() {
@@ -26,5 +28,9 @@ public final class TestRulesetPublisher {
         mPublished = true;
     }
 
-    private native void nativeCreateAndPublishRulesetDisallowingSuffixForTesting(String suffix);
+    @NativeMethods
+    interface Natives {
+        void createAndPublishRulesetDisallowingSuffixForTesting(
+                TestRulesetPublisher obj, String suffix);
+    }
 }

chrome/android/javatests/src/org/chromium/chrome/browser/test/MockCertVerifierRuleAndroid.java

@@ -25,29 +25,28 @@ public class MockCertVerifierRuleAndroid extends ExternalResource {
     protected void before() {
         NativeLibraryTestUtils.loadNativeLibraryNoBrowserProcess();
         mNativePtr = MockCertVerifierRuleAndroidJni.get().init();
-        nativeSetResult(mNativePtr, mResult);
-        nativeSetUp(mNativePtr);
+        MockCertVerifierRuleAndroidJni.get().setResult(mNativePtr, mResult);
+        MockCertVerifierRuleAndroidJni.get().setUp(mNativePtr);
     }
 
     public void setResult(int result) {
         mResult = result;
         if (mNativePtr != 0) {
-            nativeSetResult(mNativePtr, result);
+            MockCertVerifierRuleAndroidJni.get().setResult(mNativePtr, result);
         }
     }
 
     @Override
     protected void after() {
-        nativeTearDown(mNativePtr);
+        MockCertVerifierRuleAndroidJni.get().tearDown(mNativePtr);
         mNativePtr = 0;
     }
 
-    private native void nativeSetUp(long nativeMockCertVerifierRuleAndroid);
-    private native void nativeSetResult(long nativeMockCertVerifierRuleAndroid, int result);
-    private native void nativeTearDown(long nativeMockCertVerifierRuleAndroid);
-
     @NativeMethods
     interface Natives {
         long init();
+        void setUp(long nativeMockCertVerifierRuleAndroid);
+        void setResult(long nativeMockCertVerifierRuleAndroid, int result);
+        void tearDown(long nativeMockCertVerifierRuleAndroid);
     }
 }

chrome/browser/android/ssl/mock_cert_verifier_rule_android.cc

@@ -13,22 +13,15 @@ jlong JNI_MockCertVerifierRuleAndroid_Init(JNIEnv* env) {
 
 MockCertVerifierRuleAndroid::MockCertVerifierRuleAndroid() = default;
 
-void MockCertVerifierRuleAndroid::SetResult(
-    JNIEnv* env,
-    const base::android::JavaParamRef<jobject>& obj,
-    int result) {
+void MockCertVerifierRuleAndroid::SetResult(JNIEnv* env, int result) {
   mock_cert_verifier_.mock_cert_verifier()->set_default_result(result);
 }
 
-void MockCertVerifierRuleAndroid::SetUp(
-    JNIEnv* env,
-    const base::android::JavaParamRef<jobject>& obj) {
+void MockCertVerifierRuleAndroid::SetUp(JNIEnv* env) {
   mock_cert_verifier_.SetUpCommandLine(base::CommandLine::ForCurrentProcess());
   mock_cert_verifier_.SetUpInProcessBrowserTestFixture();
 }
 
-void MockCertVerifierRuleAndroid::TearDown(
-    JNIEnv* env,
-    const base::android::JavaParamRef<jobject>& obj) {
+void MockCertVerifierRuleAndroid::TearDown(JNIEnv* env) {
   mock_cert_verifier_.TearDownInProcessBrowserTestFixture();
 }

chrome/browser/android/ssl/mock_cert_verifier_rule_android.h

@@ -18,12 +18,9 @@ class MockCertVerifierRuleAndroid {
       delete;
 
   // Sets the certificate verification result to force.
-  void SetResult(JNIEnv* env,
-                 const base::android::JavaParamRef<jobject>& obj,
-                 int result);
-
-  void SetUp(JNIEnv* env, const base::android::JavaParamRef<jobject>& obj);
-  void TearDown(JNIEnv* env, const base::android::JavaParamRef<jobject>& obj);
+  void SetResult(JNIEnv* env, int result);
+  void SetUp(JNIEnv* env);
+  void TearDown(JNIEnv* env);
 
  private:
   content::ContentMockCertVerifier mock_cert_verifier_;

chrome/browser/subresource_filter/BUILD.gn

@@ -13,6 +13,7 @@ if (is_android) {
 
   android_library("subresource_filter_java_test_support") {
     testonly = true
+    annotation_processor_deps = [ "//base/android/jni_generator:jni_processor" ]
     sources = [ "../../android/javatests/src/org/chromium/chrome/browser/subresource_filter/TestRulesetPublisher.java" ]
     deps = [ "//base:jni_java" ]
   }

chrome/test/BUILD.gn

@@ -89,6 +89,7 @@ if (is_android) {
       "android/test_support/src/org/chromium/chrome/test_support/PaymentRequestTestBridge.java",
       "android/test_support/src/org/chromium/chrome/test_support/ToolbarManagerTestHelper.java",
     ]
+    annotation_processor_deps = [ "//base/android/jni_generator:jni_processor" ]
   }
 
   generate_jni("test_support_jni_headers") {

chrome/test/android/test_support/src/org/chromium/chrome/test_support/PaymentRequestTestBridge.java

@@ -10,6 +10,7 @@ import androidx.annotation.Nullable;
 
 import org.chromium.base.annotations.CalledByNative;
 import org.chromium.base.annotations.JNINamespace;
+import org.chromium.base.annotations.NativeMethods;
 import org.chromium.chrome.browser.payments.ChromePaymentRequestFactory;
 import org.chromium.chrome.browser.payments.ChromePaymentRequestService;
 import org.chromium.components.autofill.EditableOption;
@@ -96,8 +97,8 @@ public class PaymentRequestTestBridge {
 
     /**
      * Implements NativeObserverForTest by holding pointers to C++ callbacks, and invoking
-     * them through nativeResolvePaymentRequestObserverCallback() when the observer's
-     * methods are called.
+     * them through PaymentRequestTestBridgeJni.get().resolvePaymentRequestObserverCallback() when
+     * the observer's methods are called.
      */
     private static class PaymentRequestNativeObserverBridgeToNativeForTest
             implements NativeObserverForTest {
@@ -152,19 +153,23 @@ public class PaymentRequestTestBridge {
 
         @Override
         public void onCanMakePaymentCalled() {
-            nativeResolvePaymentRequestObserverCallback(mOnCanMakePaymentCalledPtr);
+            PaymentRequestTestBridgeJni.get().resolvePaymentRequestObserverCallback(
+                    mOnCanMakePaymentCalledPtr);
         }
         @Override
         public void onCanMakePaymentReturned() {
-            nativeResolvePaymentRequestObserverCallback(mOnCanMakePaymentReturnedPtr);
+            PaymentRequestTestBridgeJni.get().resolvePaymentRequestObserverCallback(
+                    mOnCanMakePaymentReturnedPtr);
         }
         @Override
         public void onHasEnrolledInstrumentCalled() {
-            nativeResolvePaymentRequestObserverCallback(mOnHasEnrolledInstrumentCalledPtr);
+            PaymentRequestTestBridgeJni.get().resolvePaymentRequestObserverCallback(
+                    mOnHasEnrolledInstrumentCalledPtr);
         }
         @Override
         public void onHasEnrolledInstrumentReturned() {
-            nativeResolvePaymentRequestObserverCallback(mOnHasEnrolledInstrumentReturnedPtr);
+            PaymentRequestTestBridgeJni.get().resolvePaymentRequestObserverCallback(
+                    mOnHasEnrolledInstrumentReturnedPtr);
         }
 
         @Override
@@ -184,23 +189,28 @@ public class PaymentRequestTestBridge {
                 }
             }
 
-            nativeSetAppDescriptions(mSetAppDescriptionsPtr, appLabels, appSublabels, appTotals);
-            nativeResolvePaymentRequestObserverCallback(mOnAppListReadyPtr);
+            PaymentRequestTestBridgeJni.get().setAppDescriptions(
+                    mSetAppDescriptionsPtr, appLabels, appSublabels, appTotals);
+            PaymentRequestTestBridgeJni.get().resolvePaymentRequestObserverCallback(
+                    mOnAppListReadyPtr);
         }
 
         @Override
         public void onShippingSectionVisibilityChange(boolean isShippingSectionVisible) {
-            nativeInvokeBooleanCallback(mSetShippingSectionVisiblePtr, isShippingSectionVisible);
+            PaymentRequestTestBridgeJni.get().invokeBooleanCallback(
+                    mSetShippingSectionVisiblePtr, isShippingSectionVisible);
         }
 
         @Override
         public void onContactSectionVisibilityChange(boolean isContactSectionVisible) {
-            nativeInvokeBooleanCallback(mSetContactSectionVisiblePtr, isContactSectionVisible);
+            PaymentRequestTestBridgeJni.get().invokeBooleanCallback(
+                    mSetContactSectionVisiblePtr, isContactSectionVisible);
         }
 
         @Override
         public void onErrorDisplayed() {
-            nativeResolvePaymentRequestObserverCallback(mOnErrorDisplayedPtr);
+            PaymentRequestTestBridgeJni.get().resolvePaymentRequestObserverCallback(
+                    mOnErrorDisplayedPtr);
         }
 
         private static String ensureNotNull(@Nullable String value) {
@@ -209,23 +219,27 @@ public class PaymentRequestTestBridge {
 
         @Override
         public void onNotSupportedError() {
-            nativeResolvePaymentRequestObserverCallback(mOnNotSupportedErrorPtr);
+            PaymentRequestTestBridgeJni.get().resolvePaymentRequestObserverCallback(
+                    mOnNotSupportedErrorPtr);
         }
         @Override
         public void onConnectionTerminated() {
-            nativeResolvePaymentRequestObserverCallback(mOnConnectionTerminatedPtr);
+            PaymentRequestTestBridgeJni.get().resolvePaymentRequestObserverCallback(
+                    mOnConnectionTerminatedPtr);
         }
         @Override
         public void onAbortCalled() {
-            nativeResolvePaymentRequestObserverCallback(mOnAbortCalledPtr);
+            PaymentRequestTestBridgeJni.get().resolvePaymentRequestObserverCallback(
+                    mOnAbortCalledPtr);
         }
         @Override
         public void onCompleteHandled() {
-            nativeResolvePaymentRequestObserverCallback(mOnCompleteHandledPtr);
+            PaymentRequestTestBridgeJni.get().resolvePaymentRequestObserverCallback(
+                    mOnCompleteHandledPtr);
         }
         @Override
         public void onUiDisplayed() {
-            nativeResolvePaymentRequestObserverCallback(mOnUiDisplayed);
+            PaymentRequestTestBridgeJni.get().resolvePaymentRequestObserverCallback(mOnUiDisplayed);
         }
     }
 
@@ -297,14 +311,16 @@ public class PaymentRequestTestBridge {
         return false;
     }
 
-    /**
-     * The native method responsible to executing RepeatingClosure pointers.
-     */
-    private static native void nativeResolvePaymentRequestObserverCallback(long callbackPtr);
+    @NativeMethods
+    interface Natives {
+        /**
+         * The native method responsible to executing RepeatingClosure pointers.
+         */
+        void resolvePaymentRequestObserverCallback(long callbackPtr);
 
-    private static native void nativeSetAppDescriptions(
-            long callbackPtr, String[] appLabels, String[] appSublabels, String[] appTotals);
-
-    /** The native method responsible for executing RepatingCallback<void(bool)> pointers. */
-    private static native void nativeInvokeBooleanCallback(long callbackPtr, boolean value);
+        void setAppDescriptions(
+                long callbackPtr, String[] appLabels, String[] appSublabels, String[] appTotals);
+        /** The native method responsible for executing RepatingCallback<void(bool)> pointers. */
+        void invokeBooleanCallback(long callbackPtr, boolean value);
+    }
 }

components/heap_profiling/multi_process/BUILD.gn

@@ -33,8 +33,12 @@ if (is_android) {
   # shim to function correctly.
   android_library("heap_profiling_java_test_support") {
     testonly = true
+    annotation_processor_deps = [ "//base/android/jni_generator:jni_processor" ]
     sources = [ "javatests/src/org/chromium/components/heap_profiling/multi_process/HeapProfilingTestShim.java" ]
-    deps = [ "//build/android:build_java" ]
+    deps = [
+      "//base:jni_java",
+      "//build/android:build_java",
+    ]
   }
 }
 

components/heap_profiling/multi_process/heap_profiling_test_shim.cc

@@ -21,14 +21,12 @@ static jlong JNI_HeapProfilingTestShim_Init(JNIEnv* env,
 HeapProfilingTestShim::HeapProfilingTestShim(JNIEnv* env, jobject obj) {}
 HeapProfilingTestShim::~HeapProfilingTestShim() = default;
 
-void HeapProfilingTestShim::Destroy(JNIEnv* env,
-                                    const JavaParamRef<jobject>& obj) {
+void HeapProfilingTestShim::Destroy(JNIEnv* env) {
   delete this;
 }
 
 jboolean HeapProfilingTestShim::RunTestForMode(
     JNIEnv* env,
-    const base::android::JavaParamRef<jobject>& obj,
     const base::android::JavaParamRef<jstring>& mode,
     jboolean dynamically_start_profiling,
     const base::android::JavaParamRef<jstring>& stack_mode,

components/heap_profiling/multi_process/heap_profiling_test_shim.h

@@ -14,14 +14,13 @@
 class HeapProfilingTestShim {
  public:
   HeapProfilingTestShim(JNIEnv* env, jobject obj);
-  void Destroy(JNIEnv* env, const base::android::JavaParamRef<jobject>& obj);
+  void Destroy(JNIEnv* env);
 
   HeapProfilingTestShim(const HeapProfilingTestShim&) = delete;
   HeapProfilingTestShim& operator=(const HeapProfilingTestShim&) = delete;
 
   jboolean RunTestForMode(
       JNIEnv* env,
-      const base::android::JavaParamRef<jobject>& obj,
       const base::android::JavaParamRef<jstring>& mode,
       jboolean dynamically_start_profiling,
       const base::android::JavaParamRef<jstring>& stack_mode,

components/heap_profiling/multi_process/javatests/src/org/chromium/components/heap_profiling/multi_process/HeapProfilingTestShim.java

@@ -4,6 +4,7 @@
 
 package org.chromium.components.heap_profiling.multi_process;
 
+import org.chromium.base.annotations.NativeMethods;
 import org.chromium.build.annotations.MainDex;
 
 /**
@@ -13,7 +14,7 @@ import org.chromium.build.annotations.MainDex;
 @MainDex
 public class HeapProfilingTestShim {
     public HeapProfilingTestShim() {
-        mNativeHeapProfilingTestShim = nativeInit();
+        mNativeHeapProfilingTestShim = HeapProfilingTestShimJni.get().init(this);
     }
 
     /**
@@ -24,8 +25,8 @@ public class HeapProfilingTestShim {
      */
     public boolean runTestForMode(String mode, boolean dynamicallyStartProfiling, String stackMode,
             boolean shouldSample, boolean sampleEverything) {
-        return nativeRunTestForMode(mNativeHeapProfilingTestShim, mode, dynamicallyStartProfiling,
-                stackMode, shouldSample, sampleEverything);
+        return HeapProfilingTestShimJni.get().runTestForMode(mNativeHeapProfilingTestShim, mode,
+                dynamicallyStartProfiling, stackMode, shouldSample, sampleEverything);
     }
 
     /**
@@ -34,15 +35,19 @@ public class HeapProfilingTestShim {
      */
     public void destroy() {
         if (mNativeHeapProfilingTestShim != 0) {
-            nativeDestroy(mNativeHeapProfilingTestShim);
+            HeapProfilingTestShimJni.get().destroy(mNativeHeapProfilingTestShim);
             mNativeHeapProfilingTestShim = 0;
         }
     }
 
     private long mNativeHeapProfilingTestShim;
-    private native long nativeInit();
-    private native void nativeDestroy(long nativeHeapProfilingTestShim);
-    private native boolean nativeRunTestForMode(long nativeHeapProfilingTestShim, String mode,
-            boolean dynamicallyStartProfiling, String stackMode, boolean shouldSample,
-            boolean sampleEverything);
+
+    @NativeMethods
+    interface Natives {
+        long init(HeapProfilingTestShim obj);
+        void destroy(long nativeHeapProfilingTestShim);
+        boolean runTestForMode(long nativeHeapProfilingTestShim, String mode,
+                boolean dynamicallyStartProfiling, String stackMode, boolean shouldSample,
+                boolean sampleEverything);
+    }
 }

content/public/test/android/BUILD.gn

@@ -17,6 +17,7 @@ android_library("android_test_message_pump_support_java") {
 
 android_library("content_java_test_support") {
   testonly = true
+  annotation_processor_deps = [ "//base/android/jni_generator:jni_processor" ]
   deps = [
     ":android_test_message_pump_support_java",
     "//base:base_java",
@@ -39,7 +40,6 @@ android_library("content_java_test_support") {
     "//url:gurl_java",
     "//url:origin_java",
   ]
-  annotation_processor_deps = [ "//base/android/jni_generator:jni_processor" ]
   sources = [
     "javatests/src/org/chromium/content_public/browser/test/ChildProcessAllocatorSettings.java",
     "javatests/src/org/chromium/content_public/browser/test/ChildProcessAllocatorSettingsHook.java",

content/public/test/android/javatests/src/org/chromium/content_public/browser/test/RenderFrameHostTestExt.java

@@ -6,6 +6,7 @@ package org.chromium.content_public.browser.test;
 
 import org.chromium.base.Callback;
 import org.chromium.base.annotations.JNINamespace;
+import org.chromium.base.annotations.NativeMethods;
 import org.chromium.content.browser.framehost.RenderFrameHostImpl;
 import org.chromium.content_public.browser.RenderFrameHost;
 
@@ -17,7 +18,8 @@ public class RenderFrameHostTestExt {
     private final long mNativeRenderFrameHostTestExt;
 
     public RenderFrameHostTestExt(RenderFrameHost host) {
-        mNativeRenderFrameHostTestExt = nativeInit(((RenderFrameHostImpl) host).getNativePtr());
+        mNativeRenderFrameHostTestExt =
+                RenderFrameHostTestExtJni.get().init(((RenderFrameHostImpl) host).getNativePtr());
     }
 
     /**
@@ -28,26 +30,31 @@ public class RenderFrameHostTestExt {
      *        serialized to a String using JSONStringValueSerializer.
      */
     public void executeJavaScript(String script, Callback<String> callback) {
-        nativeExecuteJavaScript(mNativeRenderFrameHostTestExt, script, callback, false);
+        RenderFrameHostTestExtJni.get().executeJavaScript(
+                mNativeRenderFrameHostTestExt, script, callback, false);
     }
 
     public void executeJavaScriptWithUserGesture(String script) {
-        nativeExecuteJavaScript(mNativeRenderFrameHostTestExt, script, (String r) -> {}, true);
+        RenderFrameHostTestExtJni.get().executeJavaScript(
+                mNativeRenderFrameHostTestExt, script, (String r) -> {}, true);
     }
 
     public void updateVisualState(Callback<Boolean> callback) {
-        nativeUpdateVisualState(mNativeRenderFrameHostTestExt, callback);
+        RenderFrameHostTestExtJni.get().updateVisualState(mNativeRenderFrameHostTestExt, callback);
     }
 
     public void notifyVirtualKeyboardOverlayRect(int x, int y, int width, int height) {
-        nativeNotifyVirtualKeyboardOverlayRect(mNativeRenderFrameHostTestExt, x, y, width, height);
+        RenderFrameHostTestExtJni.get().notifyVirtualKeyboardOverlayRect(
+                mNativeRenderFrameHostTestExt, x, y, width, height);
     }
 
-    private native long nativeInit(long renderFrameHostAndroidPtr);
-    private native void nativeExecuteJavaScript(long nativeRenderFrameHostTestExt, String script,
-            Callback<String> callback, boolean withUserGesture);
-    private native void nativeUpdateVisualState(
-            long nativeRenderFrameHostTestExt, Callback<Boolean> callback);
-    private native void nativeNotifyVirtualKeyboardOverlayRect(
-            long nativeRenderFrameHostTestExt, int x, int y, int width, int height);
+    @NativeMethods
+    interface Natives {
+        long init(long renderFrameHostAndroidPtr);
+        void executeJavaScript(long nativeRenderFrameHostTestExt, String script,
+                Callback<String> callback, boolean withUserGesture);
+        void updateVisualState(long nativeRenderFrameHostTestExt, Callback<Boolean> callback);
+        void notifyVirtualKeyboardOverlayRect(
+                long nativeRenderFrameHostTestExt, int x, int y, int width, int height);
+    }
 }

content/public/test/android/javatests/src/org/chromium/content_public/browser/test/util/RenderProcessHostUtils.java

@@ -5,6 +5,7 @@
 package org.chromium.content_public.browser.test.util;
 
 import org.chromium.base.annotations.JNINamespace;
+import org.chromium.base.annotations.NativeMethods;
 
 /**
  * Collection of test-only WebContents utilities.
@@ -15,8 +16,11 @@ public class RenderProcessHostUtils {
 
     public static int getCurrentRenderProcessCount() {
         return TestThreadUtils.runOnUiThreadBlockingNoException(
-                () -> { return nativeGetCurrentRenderProcessCount(); });
+                () -> { return RenderProcessHostUtilsJni.get().getCurrentRenderProcessCount(); });
     }
 
-    private static native int nativeGetCurrentRenderProcessCount();
+    @NativeMethods
+    interface Natives {
+        int getCurrentRenderProcessCount();
+    }
 }

content/public/test/android/render_frame_host_test_ext.cc

@@ -35,7 +35,6 @@ void OnExecuteJavaScriptResult(const base::android::JavaRef<jobject>& jcallback,
 }  // namespace
 
 jlong JNI_RenderFrameHostTestExt_Init(JNIEnv* env,
-                                      const JavaParamRef<jobject>& obj,
                                       jlong render_frame_host_android_ptr) {
   RenderFrameHostAndroid* rfha =
       reinterpret_cast<RenderFrameHostAndroid*>(render_frame_host_android_ptr);
@@ -52,7 +51,6 @@ RenderFrameHostTestExt::RenderFrameHostTestExt(RenderFrameHostImpl* rfhi)
 
 void RenderFrameHostTestExt::ExecuteJavaScript(
     JNIEnv* env,
-    const JavaParamRef<jobject>& obj,
     const JavaParamRef<jstring>& jscript,
     const JavaParamRef<jobject>& jcallback,
     jboolean with_user_gesture) {
@@ -70,7 +68,6 @@ void RenderFrameHostTestExt::ExecuteJavaScript(
 
 void RenderFrameHostTestExt::UpdateVisualState(
     JNIEnv* env,
-    const JavaParamRef<jobject>& obj,
     const JavaParamRef<jobject>& jcallback) {
   auto result_callback = base::BindOnce(
       &base::android::RunBooleanCallbackAndroid,
@@ -78,13 +75,11 @@ void RenderFrameHostTestExt::UpdateVisualState(
   render_frame_host_->InsertVisualStateCallback(std::move(result_callback));
 }
 
-void RenderFrameHostTestExt::NotifyVirtualKeyboardOverlayRect(
-    JNIEnv* env,
-    const JavaParamRef<jobject>& obj,
-    jint x,
-    jint y,
-    jint width,
-    jint height) {
+void RenderFrameHostTestExt::NotifyVirtualKeyboardOverlayRect(JNIEnv* env,
+                                                              jint x,
+                                                              jint y,
+                                                              jint width,
+                                                              jint height) {
   gfx::Size size(width, height);
   gfx::Point origin(x, y);
   render_frame_host_->GetPage().NotifyVirtualKeyboardOverlayRect(

content/public/test/android/render_frame_host_test_ext.h

@@ -20,23 +20,19 @@ class RenderFrameHostTestExt : public base::SupportsUserData::Data {
   explicit RenderFrameHostTestExt(RenderFrameHostImpl* rfhi);
 
   void ExecuteJavaScript(JNIEnv* env,
-                         const base::android::JavaParamRef<jobject>& obj,
                          const base::android::JavaParamRef<jstring>& jscript,
                          const base::android::JavaParamRef<jobject>& jcallback,
                          jboolean with_user_gesture);
   // This calls InsertVisualStateCallback(). See it for details on the return
   // value.
   void UpdateVisualState(JNIEnv* env,
-                         const base::android::JavaParamRef<jobject>& obj,
                          const base::android::JavaParamRef<jobject>& jcallback);
 
-  void NotifyVirtualKeyboardOverlayRect(
-      JNIEnv* env,
-      const base::android::JavaParamRef<jobject>& obj,
-      jint x,
-      jint y,
-      jint width,
-      jint height);
+  void NotifyVirtualKeyboardOverlayRect(JNIEnv* env,
+                                        jint x,
+                                        jint y,
+                                        jint width,
+                                        jint height);
 
  private:
   const raw_ptr<RenderFrameHostImpl> render_frame_host_;

device/BUILD.gn

@@ -454,6 +454,7 @@ if (is_android) {
 
   android_library("bluetooth_test_java") {
     testonly = true
+    annotation_processor_deps = [ "//base/android/jni_generator:jni_processor" ]
     sources = bluetooth_java_sources_needing_jni
     deps = [
       "//base:base_java",

device/bluetooth/test/android/java/src/org/chromium/device/bluetooth/Fakes.java

@@ -21,6 +21,7 @@ import android.util.SparseArray;
 import org.chromium.base.Log;
 import org.chromium.base.annotations.CalledByNative;
 import org.chromium.base.annotations.JNINamespace;
+import org.chromium.base.annotations.NativeMethods;
 import org.chromium.components.location.LocationUtils;
 import org.chromium.device.bluetooth.test.TestRSSI;
 import org.chromium.device.bluetooth.test.TestTxPower;
@@ -71,7 +72,7 @@ class Fakes {
      * Sets the factory for ThreadUtilsWrapper to always post a task to the UI thread
      * rather than running the task immediately. This simulates events arriving on a separate
      * thread on Android.
-     * runOnUiThread uses nativePostTaskFromJava. This allows java to post tasks to the
+     * runOnUiThread uses FakesJni.get().postTaskFromJava. This allows java to post tasks to the
      * message loop that the test is using rather than to the Java message loop which
      * is not running during tests.
      */
@@ -83,7 +84,7 @@ class Fakes {
                 return new Wrappers.ThreadUtilsWrapper() {
                     @Override
                     public void runOnUiThread(Runnable r) {
-                        nativePostTaskFromJava(nativeBluetoothTestAndroid, r);
+                        FakesJni.get().postTaskFromJava(nativeBluetoothTestAndroid, r);
                     }
                 };
             }
@@ -245,11 +246,11 @@ class Fakes {
         public boolean disable() {
             // android.bluetooth.BluetoothAdapter::disable() is an async call, so we simulate this
             // by posting a task to the UI thread.
-            nativePostTaskFromJava(mNativeBluetoothTestAndroid, new Runnable() {
+            FakesJni.get().postTaskFromJava(mNativeBluetoothTestAndroid, new Runnable() {
                 @Override
                 public void run() {
                     mPowered = false;
-                    nativeOnFakeAdapterStateChanged(mNativeBluetoothTestAndroid, false);
+                    FakesJni.get().onFakeAdapterStateChanged(mNativeBluetoothTestAndroid, false);
                 }
             });
             return true;
@@ -259,11 +260,11 @@ class Fakes {
         public boolean enable() {
             // android.bluetooth.BluetoothAdapter::enable() is an async call, so we simulate this by
             // posting a task to the UI thread.
-            nativePostTaskFromJava(mNativeBluetoothTestAndroid, new Runnable() {
+            FakesJni.get().postTaskFromJava(mNativeBluetoothTestAndroid, new Runnable() {
                 @Override
                 public void run() {
                     mPowered = true;
-                    nativeOnFakeAdapterStateChanged(mNativeBluetoothTestAndroid, true);
+                    FakesJni.get().onFakeAdapterStateChanged(mNativeBluetoothTestAndroid, true);
                 }
             });
             return true;
@@ -530,7 +531,8 @@ class Fakes {
                         "BluetoothGattWrapper doesn't support calls to connectGatt() with "
                         + "multiple distinct callbacks.");
             }
-            nativeOnFakeBluetoothDeviceConnectGattCalled(mAdapter.mNativeBluetoothTestAndroid);
+            FakesJni.get().onFakeBluetoothDeviceConnectGattCalled(
+                    mAdapter.mNativeBluetoothTestAndroid);
             mGattCallback = callback;
             return mGatt;
         }
@@ -576,12 +578,13 @@ class Fakes {
 
         @Override
         public void disconnect() {
-            nativeOnFakeBluetoothGattDisconnect(mDevice.mAdapter.mNativeBluetoothTestAndroid);
+            FakesJni.get().onFakeBluetoothGattDisconnect(
+                    mDevice.mAdapter.mNativeBluetoothTestAndroid);
         }
 
         @Override
         public void close() {
-            nativeOnFakeBluetoothGattClose(mDevice.mAdapter.mNativeBluetoothTestAndroid);
+            FakesJni.get().onFakeBluetoothGattClose(mDevice.mAdapter.mNativeBluetoothTestAndroid);
         }
 
         @Override
@@ -591,7 +594,8 @@ class Fakes {
 
         @Override
         public void discoverServices() {
-            nativeOnFakeBluetoothGattDiscoverServices(mDevice.mAdapter.mNativeBluetoothTestAndroid);
+            FakesJni.get().onFakeBluetoothGattDiscoverServices(
+                    mDevice.mAdapter.mNativeBluetoothTestAndroid);
         }
 
         @Override
@@ -605,7 +609,7 @@ class Fakes {
                 mReadCharacteristicWillFailSynchronouslyOnce = false;
                 return false;
             }
-            nativeOnFakeBluetoothGattReadCharacteristic(
+            FakesJni.get().onFakeBluetoothGattReadCharacteristic(
                     mDevice.mAdapter.mNativeBluetoothTestAndroid);
             return true;
         }
@@ -617,7 +621,7 @@ class Fakes {
                 mSetCharacteristicNotificationWillFailSynchronouslyOnce = false;
                 return false;
             }
-            nativeOnFakeBluetoothGattSetCharacteristicNotification(
+            FakesJni.get().onFakeBluetoothGattSetCharacteristicNotification(
                     mDevice.mAdapter.mNativeBluetoothTestAndroid);
             return true;
         }
@@ -628,7 +632,7 @@ class Fakes {
                 mWriteCharacteristicWillFailSynchronouslyOnce = false;
                 return false;
             }
-            nativeOnFakeBluetoothGattWriteCharacteristic(
+            FakesJni.get().onFakeBluetoothGattWriteCharacteristic(
                     mDevice.mAdapter.mNativeBluetoothTestAndroid, characteristic.getValue());
             return true;
         }
@@ -639,7 +643,8 @@ class Fakes {
                 mReadDescriptorWillFailSynchronouslyOnce = false;
                 return false;
             }
-            nativeOnFakeBluetoothGattReadDescriptor(mDevice.mAdapter.mNativeBluetoothTestAndroid);
+            FakesJni.get().onFakeBluetoothGattReadDescriptor(
+                    mDevice.mAdapter.mNativeBluetoothTestAndroid);
             return true;
         }
 
@@ -649,7 +654,7 @@ class Fakes {
                 mWriteDescriptorWillFailSynchronouslyOnce = false;
                 return false;
             }
-            nativeOnFakeBluetoothGattWriteDescriptor(
+            FakesJni.get().onFakeBluetoothGattWriteDescriptor(
                     mDevice.mAdapter.mNativeBluetoothTestAndroid, descriptor.getValue());
             return true;
         }
@@ -987,45 +992,40 @@ class Fakes {
 
     // ---------------------------------------------------------------------------------------------
     // BluetoothTestAndroid C++ methods declared for access from java:
+    @NativeMethods
+    interface Natives {
 
-    // Bind to BluetoothTestAndroid::PostTaskFromJava.
-    private static native void nativePostTaskFromJava(long nativeBluetoothTestAndroid, Runnable r);
+        // Bind to BluetoothTestAndroid::PostTaskFromJava.
+        void postTaskFromJava(long nativeBluetoothTestAndroid, Runnable r);
 
-    // Binds to BluetoothTestAndroid::OnFakeAdapterStateChanged.
-    private static native void nativeOnFakeAdapterStateChanged(
-            long nativeBluetoothTestAndroid, boolean powered);
+        // Binds to BluetoothTestAndroid::OnFakeAdapterStateChanged.
+        void onFakeAdapterStateChanged(long nativeBluetoothTestAndroid, boolean powered);
 
-    // Binds to BluetoothTestAndroid::OnFakeBluetoothDeviceConnectGattCalled.
-    private static native void nativeOnFakeBluetoothDeviceConnectGattCalled(
-            long nativeBluetoothTestAndroid);
+        // Binds to BluetoothTestAndroid::OnFakeBluetoothDeviceConnectGattCalled.
+        void onFakeBluetoothDeviceConnectGattCalled(long nativeBluetoothTestAndroid);
 
-    // Binds to BluetoothTestAndroid::OnFakeBluetoothGattDisconnect.
-    private static native void nativeOnFakeBluetoothGattDisconnect(long nativeBluetoothTestAndroid);
+        // Binds to BluetoothTestAndroid::OnFakeBluetoothGattDisconnect.
+        void onFakeBluetoothGattDisconnect(long nativeBluetoothTestAndroid);
 
-    // Binds to BluetoothTestAndroid::OnFakeBluetoothGattClose.
-    private static native void nativeOnFakeBluetoothGattClose(long nativeBluetoothTestAndroid);
+        // Binds to BluetoothTestAndroid::OnFakeBluetoothGattClose.
+        void onFakeBluetoothGattClose(long nativeBluetoothTestAndroid);
 
-    // Binds to BluetoothTestAndroid::OnFakeBluetoothGattDiscoverServices.
-    private static native void nativeOnFakeBluetoothGattDiscoverServices(
-            long nativeBluetoothTestAndroid);
+        // Binds to BluetoothTestAndroid::OnFakeBluetoothGattDiscoverServices.
+        void onFakeBluetoothGattDiscoverServices(long nativeBluetoothTestAndroid);
 
-    // Binds to BluetoothTestAndroid::OnFakeBluetoothGattSetCharacteristicNotification.
-    private static native void nativeOnFakeBluetoothGattSetCharacteristicNotification(
-            long nativeBluetoothTestAndroid);
+        // Binds to BluetoothTestAndroid::OnFakeBluetoothGattSetCharacteristicNotification.
+        void onFakeBluetoothGattSetCharacteristicNotification(long nativeBluetoothTestAndroid);
 
-    // Binds to BluetoothTestAndroid::OnFakeBluetoothGattReadCharacteristic.
-    private static native void nativeOnFakeBluetoothGattReadCharacteristic(
-            long nativeBluetoothTestAndroid);
+        // Binds to BluetoothTestAndroid::OnFakeBluetoothGattReadCharacteristic.
+        void onFakeBluetoothGattReadCharacteristic(long nativeBluetoothTestAndroid);
 
-    // Binds to BluetoothTestAndroid::OnFakeBluetoothGattWriteCharacteristic.
-    private static native void nativeOnFakeBluetoothGattWriteCharacteristic(
-            long nativeBluetoothTestAndroid, byte[] value);
+        // Binds to BluetoothTestAndroid::OnFakeBluetoothGattWriteCharacteristic.
+        void onFakeBluetoothGattWriteCharacteristic(long nativeBluetoothTestAndroid, byte[] value);
 
-    // Binds to BluetoothTestAndroid::OnFakeBluetoothGattReadDescriptor.
-    private static native void nativeOnFakeBluetoothGattReadDescriptor(
-            long nativeBluetoothTestAndroid);
+        // Binds to BluetoothTestAndroid::OnFakeBluetoothGattReadDescriptor.
+        void onFakeBluetoothGattReadDescriptor(long nativeBluetoothTestAndroid);
 
-    // Binds to BluetoothTestAndroid::OnFakeBluetoothGattWriteDescriptor.
-    private static native void nativeOnFakeBluetoothGattWriteDescriptor(
-            long nativeBluetoothTestAndroid, byte[] value);
+        // Binds to BluetoothTestAndroid::OnFakeBluetoothGattWriteDescriptor.
+        void onFakeBluetoothGattWriteDescriptor(long nativeBluetoothTestAndroid, byte[] value);
+    }
 }

mojo/public/java/system/BUILD.gn

@@ -70,8 +70,8 @@ android_library("system_impl_java") {
 # Targets should also depend on :test_support for the native side.
 android_library("test_support_java") {
   testonly = true
-  sources = [ "javatests/src/org/chromium/mojo/MojoTestRule.java" ]
   annotation_processor_deps = [ "//base/android/jni_generator:jni_processor" ]
+  sources = [ "javatests/src/org/chromium/mojo/MojoTestRule.java" ]
   deps = [
     "//base:base_java",
     "//base:jni_java",

mojo/public/java/system/javatests/mojo_test_rule.cc

@@ -34,27 +34,20 @@ static void JNI_MojoTestRule_InitCore(JNIEnv* env) {
   mojo::core::Init();
 }
 
-static void JNI_MojoTestRule_Init(JNIEnv* env,
-                                  const JavaParamRef<jobject>& jcaller) {
+static void JNI_MojoTestRule_Init(JNIEnv* env) {
   base::InitAndroidTestMessageLoop();
 }
 
-static jlong JNI_MojoTestRule_SetupTestEnvironment(
-    JNIEnv* env,
-    const JavaParamRef<jobject>& jcaller) {
+static jlong JNI_MojoTestRule_SetupTestEnvironment(JNIEnv* env) {
   return reinterpret_cast<intptr_t>(new TestEnvironment());
 }
 
-static void JNI_MojoTestRule_TearDownTestEnvironment(
-    JNIEnv* env,
-    const JavaParamRef<jobject>& jcaller,
-    jlong test_environment) {
+static void JNI_MojoTestRule_TearDownTestEnvironment(JNIEnv* env,
+                                                     jlong test_environment) {
   delete reinterpret_cast<TestEnvironment*>(test_environment);
 }
 
-static void JNI_MojoTestRule_RunLoop(JNIEnv* env,
-                                     const JavaParamRef<jobject>& jcaller,
-                                     jlong timeout_ms) {
+static void JNI_MojoTestRule_RunLoop(JNIEnv* env, jlong timeout_ms) {
   base::RunLoop run_loop;
   if (timeout_ms) {
     base::SingleThreadTaskRunner::GetCurrentDefault()->PostDelayedTask(

mojo/public/java/system/javatests/src/org/chromium/mojo/MojoTestRule.java

@@ -48,39 +48,35 @@ public class MojoTestRule extends ExternalResource {
             MojoTestRuleJni.get().initCore();
             sIsCoreInitialized = true;
         }
-        nativeInit();
-        mTestEnvironmentPointer = nativeSetupTestEnvironment();
+        MojoTestRuleJni.get().init();
+        mTestEnvironmentPointer = MojoTestRuleJni.get().setupTestEnvironment();
     }
 
     @Override
     protected void after() {
-        nativeTearDownTestEnvironment(mTestEnvironmentPointer);
+        MojoTestRuleJni.get().tearDownTestEnvironment(mTestEnvironmentPointer);
     }
 
     /**
      * Runs the run loop for the given time.
      */
     public void runLoop(long timeoutMS) {
-        nativeRunLoop(timeoutMS);
+        MojoTestRuleJni.get().runLoop(timeoutMS);
     }
 
     /**
      * Runs the run loop until no handle or task are immediately available.
      */
     public void runLoopUntilIdle() {
-        nativeRunLoop(0);
+        MojoTestRuleJni.get().runLoop(0);
     }
 
-    private native void nativeInit();
-
-    private native long nativeSetupTestEnvironment();
-
-    private native void nativeTearDownTestEnvironment(long testEnvironment);
-
-    private native void nativeRunLoop(long timeoutMS);
-
     @NativeMethods
     interface Natives {
+        void init();
+        long setupTestEnvironment();
+        void tearDownTestEnvironment(long testEnvironment);
+        void runLoop(long timeoutMS);
         void initCore();
     }
 }

net/android/BUILD.gn

@@ -92,6 +92,7 @@ android_library("net_java_test_support") {
 
 android_library("net_java_test_support_provider") {
   testonly = true
+  annotation_processor_deps = [ "//base/android/jni_generator:jni_processor" ]
   sources = [
     "../test/android/javatests/src/org/chromium/net/test/DummySpnegoAuthenticator.java",
     "../test/android/javatests/src/org/chromium/net/test/DummySpnegoAuthenticatorService.java",

net/android/dummy_spnego_authenticator.cc

@@ -137,20 +137,15 @@ DummySpnegoAuthenticator::SecurityContextQuery::~SecurityContextQuery() =
     default;
 
 base::android::ScopedJavaLocalRef<jstring>
-DummySpnegoAuthenticator::SecurityContextQuery::GetTokenToReturn(
-    JNIEnv* env,
-    const JavaParamRef<jobject>& /*obj*/) {
+DummySpnegoAuthenticator::SecurityContextQuery::GetTokenToReturn(JNIEnv* env) {
   return base::android::ConvertUTF8ToJavaString(env, output_token.c_str());
 }
-int DummySpnegoAuthenticator::SecurityContextQuery::GetResult(
-    JNIEnv* /*env*/,
-    const JavaParamRef<jobject>& /*obj*/) {
+int DummySpnegoAuthenticator::SecurityContextQuery::GetResult(JNIEnv* /*env*/) {
   return response_code;
 }
 
 void DummySpnegoAuthenticator::SecurityContextQuery::CheckGetTokenArguments(
     JNIEnv* env,
-    const JavaParamRef<jobject>& /*obj*/,
     const JavaParamRef<jstring>& j_incoming_token) {
   std::string incoming_token =
       base::android::ConvertJavaStringToUTF8(env, j_incoming_token);
@@ -187,9 +182,7 @@ void DummySpnegoAuthenticator::ExpectSecurityContext(
       base::android::AttachCurrentThread(), reinterpret_cast<intptr_t>(this));
 }
 
-long DummySpnegoAuthenticator::GetNextQuery(
-    JNIEnv* /*env*/,
-    const JavaParamRef<jobject>& /* obj */) {
+long DummySpnegoAuthenticator::GetNextQuery(JNIEnv* /*env*/) {
   CheckQueueNotEmpty();
   current_query_ = expected_security_queries_.front();
   expected_security_queries_.pop_front();

net/android/dummy_spnego_authenticator.h

@@ -93,17 +93,14 @@ class DummySpnegoAuthenticator {
     std::string output_token;
 
     // Java callable members
-    base::android::ScopedJavaLocalRef<jstring> GetTokenToReturn(
-        JNIEnv* env,
-        const base::android::JavaParamRef<jobject>& obj);
-    int GetResult(JNIEnv* env, const base::android::JavaParamRef<jobject>& obj);
+    base::android::ScopedJavaLocalRef<jstring> GetTokenToReturn(JNIEnv* env);
+    int GetResult(JNIEnv* env);
 
     // Called from Java to check the arguments passed to the GetToken. Has to
     // be in C++ since these tests are driven by googletest, and can only report
     // failures through the googletest C++ API.
     void CheckGetTokenArguments(
         JNIEnv* env,
-        const base::android::JavaParamRef<jobject>& obj,
         const base::android::JavaParamRef<jstring>& incoming_token);
   };
 
@@ -121,8 +118,7 @@ class DummySpnegoAuthenticator {
   static void EnsureTestAccountExists();
   static void RemoveTestAccounts();
 
-  long GetNextQuery(JNIEnv* env,
-                    const base::android::JavaParamRef<jobject>& obj);
+  long GetNextQuery(JNIEnv* env);
 
  private:
   // Abandon the test if the query queue is empty. Has to be a void function to

net/test/android/javatests/src/org/chromium/net/test/DummySpnegoAuthenticator.java

@@ -18,6 +18,7 @@ import org.chromium.base.ApplicationStatus;
 import org.chromium.base.annotations.CalledByNative;
 import org.chromium.base.annotations.JNINamespace;
 import org.chromium.base.annotations.NativeClassQualifiedName;
+import org.chromium.base.annotations.NativeMethods;
 import org.chromium.net.HttpNegotiateConstants;
 
 import java.io.IOException;
@@ -69,20 +70,22 @@ public class DummySpnegoAuthenticator extends AbstractAccountAuthenticator {
     @Override
     public Bundle getAuthToken(AccountAuthenticatorResponse response, Account account,
             String authTokenType, Bundle options) {
-        long nativeQuery = nativeGetNextQuery(sNativeDummySpnegoAuthenticator);
+        long nativeQuery =
+                DummySpnegoAuthenticatorJni.get().getNextQuery(sNativeDummySpnegoAuthenticator);
         String incomingToken = options.getString(HttpNegotiateConstants.KEY_INCOMING_AUTH_TOKEN);
-        nativeCheckGetTokenArguments(nativeQuery, incomingToken);
+        DummySpnegoAuthenticatorJni.get().checkGetTokenArguments(nativeQuery, incomingToken);
         Bundle result = new Bundle();
         result.putString(AccountManager.KEY_ACCOUNT_NAME, account.name);
         result.putString(AccountManager.KEY_ACCOUNT_TYPE, account.type);
-        result.putString(AccountManager.KEY_AUTHTOKEN, nativeGetTokenToReturn(nativeQuery));
+        result.putString(AccountManager.KEY_AUTHTOKEN,
+                DummySpnegoAuthenticatorJni.get().getTokenToReturn(nativeQuery));
         result.putInt(HttpNegotiateConstants.KEY_SPNEGO_RESULT,
-                decodeResult(nativeGetResult(nativeQuery)));
+                decodeResult(DummySpnegoAuthenticatorJni.get().getResult(nativeQuery)));
         return result;
     }
 
     /**
-     * @param nativeGetResult
+     * @param DummySpnegoAuthenticatorJni.get().getResult
      * @return
      */
     private int decodeResult(int gssApiResult) {
@@ -162,22 +165,25 @@ public class DummySpnegoAuthenticator extends AbstractAccountAuthenticator {
         sNativeDummySpnegoAuthenticator = nativeDummySpnegoAuthenticator;
     }
 
-    /**
-     * Send the relevant decoded arguments of getAuthToken to C++ for checking by googletest checks
-     * If the checks fail then the C++ unit test using this authenticator will fail.
-     *
-     * @param authTokenType
-     * @param spn
-     * @param incomingToken
-     */
-    @NativeClassQualifiedName("DummySpnegoAuthenticator::SecurityContextQuery")
-    private native void nativeCheckGetTokenArguments(long nativeQuery, String incomingToken);
+    @NativeMethods
+    interface Natives {
+        /**
+         * Send the relevant decoded arguments of getAuthToken to C++ for checking by googletest
+         * checks If the checks fail then the C++ unit test using this authenticator will fail.
+         *
+         * @param authTokenType
+         * @param spn
+         * @param incomingToken
+         */
+        @NativeClassQualifiedName("DummySpnegoAuthenticator::SecurityContextQuery")
+        void checkGetTokenArguments(long nativeQuery, String incomingToken);
 
-    @NativeClassQualifiedName("DummySpnegoAuthenticator::SecurityContextQuery")
-    private native String nativeGetTokenToReturn(long nativeQuery);
+        @NativeClassQualifiedName("DummySpnegoAuthenticator::SecurityContextQuery")
+        String getTokenToReturn(long nativeQuery);
 
-    @NativeClassQualifiedName("DummySpnegoAuthenticator::SecurityContextQuery")
-    private native int nativeGetResult(long nativeQuery);
+        @NativeClassQualifiedName("DummySpnegoAuthenticator::SecurityContextQuery")
+        int getResult(long nativeQuery);
 
-    private native long nativeGetNextQuery(long nativeDummySpnegoAuthenticator);
+        long getNextQuery(long nativeDummySpnegoAuthenticator);
+    }
 }

net/test/android/javatests/src/org/chromium/net/test/EmbeddedTestServerImpl.java

@@ -14,6 +14,7 @@ import org.chromium.base.ContextUtils;
 import org.chromium.base.Log;
 import org.chromium.base.annotations.CalledByNative;
 import org.chromium.base.annotations.JNINamespace;
+import org.chromium.base.annotations.NativeMethods;
 import org.chromium.base.library_loader.LibraryLoader;
 import org.chromium.base.library_loader.LibraryProcessType;
 import org.chromium.base.test.util.UrlUtils;
@@ -79,7 +80,8 @@ public class EmbeddedTestServerImpl extends IEmbeddedTestServerImpl.Stub {
             @Override
             public Void call() {
                 if (mNativeEmbeddedTestServer == 0) {
-                    nativeInit(UrlUtils.getIsolatedTestRoot(), https);
+                    EmbeddedTestServerImplJni.get().init(
+                            EmbeddedTestServerImpl.this, UrlUtils.getIsolatedTestRoot(), https);
                 }
                 assert mNativeEmbeddedTestServer != 0;
                 return null;
@@ -102,7 +104,7 @@ public class EmbeddedTestServerImpl extends IEmbeddedTestServerImpl.Stub {
         return runOnHandlerThread(new Callable<Boolean>() {
             @Override
             public Boolean call() {
-                return nativeStart(mNativeEmbeddedTestServer, port);
+                return EmbeddedTestServerImplJni.get().start(mNativeEmbeddedTestServer, port);
             }
         });
     }
@@ -116,7 +118,8 @@ public class EmbeddedTestServerImpl extends IEmbeddedTestServerImpl.Stub {
         return runOnHandlerThread(new Callable<String>() {
             @Override
             public String call() {
-                return nativeGetRootCertPemPath(mNativeEmbeddedTestServer);
+                return EmbeddedTestServerImplJni.get().getRootCertPemPath(
+                        mNativeEmbeddedTestServer);
             }
         });
     }
@@ -132,7 +135,8 @@ public class EmbeddedTestServerImpl extends IEmbeddedTestServerImpl.Stub {
         runOnHandlerThread(new Callable<Void>() {
             @Override
             public Void call() {
-                nativeAddDefaultHandlers(mNativeEmbeddedTestServer, directoryPath);
+                EmbeddedTestServerImplJni.get().addDefaultHandlers(
+                        mNativeEmbeddedTestServer, directoryPath);
                 return null;
             }
         });
@@ -147,7 +151,8 @@ public class EmbeddedTestServerImpl extends IEmbeddedTestServerImpl.Stub {
         runOnHandlerThread(new Callable<Void>() {
             @Override
             public Void call() {
-                nativeSetSSLConfig(mNativeEmbeddedTestServer, serverCertificate);
+                EmbeddedTestServerImplJni.get().setSSLConfig(
+                        mNativeEmbeddedTestServer, serverCertificate);
                 return null;
             }
         });
@@ -162,7 +167,8 @@ public class EmbeddedTestServerImpl extends IEmbeddedTestServerImpl.Stub {
         runOnHandlerThread(new Callable<Void>() {
             @Override
             public Void call() {
-                nativeRegisterRequestHandler(mNativeEmbeddedTestServer, handler);
+                EmbeddedTestServerImplJni.get().registerRequestHandler(
+                        mNativeEmbeddedTestServer, handler);
                 return null;
             }
         });
@@ -177,7 +183,8 @@ public class EmbeddedTestServerImpl extends IEmbeddedTestServerImpl.Stub {
         runOnHandlerThread(new Callable<Void>() {
             @Override
             public Void call() {
-                nativeServeFilesFromDirectory(mNativeEmbeddedTestServer, directoryPath);
+                EmbeddedTestServerImplJni.get().serveFilesFromDirectory(
+                        mNativeEmbeddedTestServer, directoryPath);
                 return null;
             }
         });
@@ -210,7 +217,8 @@ public class EmbeddedTestServerImpl extends IEmbeddedTestServerImpl.Stub {
         return runOnHandlerThread(new Callable<String>() {
             @Override
             public String call() {
-                return nativeGetURL(mNativeEmbeddedTestServer, relativeUrl);
+                return EmbeddedTestServerImplJni.get().getURL(
+                        mNativeEmbeddedTestServer, relativeUrl);
             }
         });
     }
@@ -227,7 +235,8 @@ public class EmbeddedTestServerImpl extends IEmbeddedTestServerImpl.Stub {
         return runOnHandlerThread(new Callable<String>() {
             @Override
             public String call() {
-                return nativeGetURLWithHostName(mNativeEmbeddedTestServer, hostName, relativeUrl);
+                return EmbeddedTestServerImplJni.get().getURLWithHostName(
+                        mNativeEmbeddedTestServer, hostName, relativeUrl);
             }
         });
     }
@@ -241,7 +250,8 @@ public class EmbeddedTestServerImpl extends IEmbeddedTestServerImpl.Stub {
         return runOnHandlerThread(new Callable<Boolean>() {
             @Override
             public Boolean call() {
-                return nativeShutdownAndWaitUntilComplete(mNativeEmbeddedTestServer);
+                return EmbeddedTestServerImplJni.get().shutdownAndWaitUntilComplete(
+                        mNativeEmbeddedTestServer);
             }
         });
     }
@@ -253,7 +263,7 @@ public class EmbeddedTestServerImpl extends IEmbeddedTestServerImpl.Stub {
             @Override
             public Void call() {
                 assert mNativeEmbeddedTestServer != 0;
-                nativeDestroy(mNativeEmbeddedTestServer);
+                EmbeddedTestServerImplJni.get().destroy(mNativeEmbeddedTestServer);
                 assert mNativeEmbeddedTestServer == 0;
                 return null;
             }
@@ -309,20 +319,19 @@ public class EmbeddedTestServerImpl extends IEmbeddedTestServerImpl.Stub {
         mNativeEmbeddedTestServer = 0;
     }
 
-    private native void nativeInit(String testDataDir, boolean https);
-    private native void nativeDestroy(long nativeEmbeddedTestServerAndroid);
-    private native boolean nativeStart(long nativeEmbeddedTestServerAndroid, int port);
-    private native String nativeGetRootCertPemPath(long nativeEmbeddedTestServerAndroid);
-    private native boolean nativeShutdownAndWaitUntilComplete(long nativeEmbeddedTestServerAndroid);
-    private native void nativeAddDefaultHandlers(
-            long nativeEmbeddedTestServerAndroid, String directoryPath);
-    private native void nativeSetSSLConfig(
-            long nativeEmbeddedTestServerAndroid, int serverCertificate);
-    private native void nativeRegisterRequestHandler(
-            long nativeEmbeddedTestServerAndroid, long handler);
-    private native String nativeGetURL(long nativeEmbeddedTestServerAndroid, String relativeUrl);
-    private native String nativeGetURLWithHostName(
-            long nativeEmbeddedTestServerAndroid, String hostName, String relativeUrl);
-    private native void nativeServeFilesFromDirectory(
-            long nativeEmbeddedTestServerAndroid, String directoryPath);
+    @NativeMethods
+    interface Natives {
+        void init(EmbeddedTestServerImpl obj, String testDataDir, boolean https);
+        void destroy(long nativeEmbeddedTestServerAndroid);
+        boolean start(long nativeEmbeddedTestServerAndroid, int port);
+        String getRootCertPemPath(long nativeEmbeddedTestServerAndroid);
+        boolean shutdownAndWaitUntilComplete(long nativeEmbeddedTestServerAndroid);
+        void addDefaultHandlers(long nativeEmbeddedTestServerAndroid, String directoryPath);
+        void setSSLConfig(long nativeEmbeddedTestServerAndroid, int serverCertificate);
+        void registerRequestHandler(long nativeEmbeddedTestServerAndroid, long handler);
+        String getURL(long nativeEmbeddedTestServerAndroid, String relativeUrl);
+        String getURLWithHostName(
+                long nativeEmbeddedTestServerAndroid, String hostName, String relativeUrl);
+        void serveFilesFromDirectory(long nativeEmbeddedTestServerAndroid, String directoryPath);
+    }
 }

net/test/embedded_test_server/android/embedded_test_server_android.cc

@@ -59,28 +59,22 @@ EmbeddedTestServerAndroid::~EmbeddedTestServerAndroid() {
   Java_EmbeddedTestServerImpl_clearNativePtr(env, weak_java_server_.get(env));
 }
 
-jboolean EmbeddedTestServerAndroid::Start(JNIEnv* env,
-                                          const JavaParamRef<jobject>& jobj,
-                                          jint port) {
+jboolean EmbeddedTestServerAndroid::Start(JNIEnv* env, jint port) {
   return test_server_.Start(static_cast<int>(port));
 }
 
 ScopedJavaLocalRef<jstring> EmbeddedTestServerAndroid::GetRootCertPemPath(
-    JNIEnv* env,
-    const JavaParamRef<jobject>& jobj) const {
+    JNIEnv* env) const {
   return base::android::ConvertUTF8ToJavaString(
       env, test_server_.GetRootCertPemPath().value());
 }
 
-jboolean EmbeddedTestServerAndroid::ShutdownAndWaitUntilComplete(
-    JNIEnv* env,
-    const JavaParamRef<jobject>& jobj) {
+jboolean EmbeddedTestServerAndroid::ShutdownAndWaitUntilComplete(JNIEnv* env) {
   return test_server_.ShutdownAndWaitUntilComplete();
 }
 
 ScopedJavaLocalRef<jstring> EmbeddedTestServerAndroid::GetURL(
     JNIEnv* env,
-    const JavaParamRef<jobject>& jobj,
     const JavaParamRef<jstring>& jrelative_url) const {
   const GURL gurl(test_server_.GetURL(
       base::android::ConvertJavaStringToUTF8(env, jrelative_url)));
@@ -89,7 +83,6 @@ ScopedJavaLocalRef<jstring> EmbeddedTestServerAndroid::GetURL(
 
 ScopedJavaLocalRef<jstring> EmbeddedTestServerAndroid::GetURLWithHostName(
     JNIEnv* env,
-    const JavaParamRef<jobject>& jobj,
     const JavaParamRef<jstring>& jhostname,
     const JavaParamRef<jstring>& jrelative_url) const {
   const GURL gurl(test_server_.GetURL(
@@ -100,7 +93,6 @@ ScopedJavaLocalRef<jstring> EmbeddedTestServerAndroid::GetURLWithHostName(
 
 void EmbeddedTestServerAndroid::AddDefaultHandlers(
     JNIEnv* env,
-    const JavaParamRef<jobject>& jobj,
     const JavaParamRef<jstring>& jdirectory_path) {
   const base::FilePath directory(
       base::android::ConvertJavaStringToUTF8(env, jdirectory_path));
@@ -108,7 +100,6 @@ void EmbeddedTestServerAndroid::AddDefaultHandlers(
 }
 
 void EmbeddedTestServerAndroid::SetSSLConfig(JNIEnv* jenv,
-                                             const JavaParamRef<jobject>& jobj,
                                              jint jserver_certificate) {
   test_server_.SetSSLConfig(
       static_cast<EmbeddedTestServer::ServerCertificate>(jserver_certificate));
@@ -117,17 +108,14 @@ void EmbeddedTestServerAndroid::SetSSLConfig(JNIEnv* jenv,
 typedef std::unique_ptr<HttpResponse> (*HandleRequestPtr)(
     const HttpRequest& request);
 
-void EmbeddedTestServerAndroid::RegisterRequestHandler(
-    JNIEnv* env,
-    const JavaParamRef<jobject>& jobj,
-    jlong handler) {
+void EmbeddedTestServerAndroid::RegisterRequestHandler(JNIEnv* env,
+                                                       jlong handler) {
   HandleRequestPtr handler_ptr = reinterpret_cast<HandleRequestPtr>(handler);
   test_server_.RegisterRequestHandler(base::BindRepeating(handler_ptr));
 }
 
 void EmbeddedTestServerAndroid::ServeFilesFromDirectory(
     JNIEnv* env,
-    const JavaParamRef<jobject>& jobj,
     const JavaParamRef<jstring>& jdirectory_path) {
   const base::FilePath directory(
       base::android::ConvertJavaStringToUTF8(env, jdirectory_path));
@@ -146,8 +134,7 @@ void EmbeddedTestServerAndroid::ReadFromSocket(const void* socket_id) {
       env, weak_java_server_.get(env), reinterpret_cast<intptr_t>(socket_id));
 }
 
-void EmbeddedTestServerAndroid::Destroy(JNIEnv* env,
-                                        const JavaParamRef<jobject>& jobj) {
+void EmbeddedTestServerAndroid::Destroy(JNIEnv* env) {
   delete this;
 }
 

net/test/embedded_test_server/android/embedded_test_server_android.h

@@ -30,47 +30,34 @@ class EmbeddedTestServerAndroid {
 
   ~EmbeddedTestServerAndroid();
 
-  void Destroy(JNIEnv* env, const base::android::JavaParamRef<jobject>& obj);
+  void Destroy(JNIEnv* env);
 
-  jboolean Start(JNIEnv* env,
-                 const base::android::JavaParamRef<jobject>& jobj,
-                 jint port);
+  jboolean Start(JNIEnv* env, jint port);
 
   base::android::ScopedJavaLocalRef<jstring> GetRootCertPemPath(
-      JNIEnv* jenv,
-      const base::android::JavaParamRef<jobject>& jobj) const;
+      JNIEnv* jenv) const;
 
-  jboolean ShutdownAndWaitUntilComplete(
-      JNIEnv* env,
-      const base::android::JavaParamRef<jobject>& jobj);
+  jboolean ShutdownAndWaitUntilComplete(JNIEnv* env);
 
   base::android::ScopedJavaLocalRef<jstring> GetURL(
       JNIEnv* jenv,
-      const base::android::JavaParamRef<jobject>& jobj,
       const base::android::JavaParamRef<jstring>& jrelative_url) const;
 
   base::android::ScopedJavaLocalRef<jstring> GetURLWithHostName(
       JNIEnv* jenv,
-      const base::android::JavaParamRef<jobject>& jobj,
       const base::android::JavaParamRef<jstring>& jhostname,
       const base::android::JavaParamRef<jstring>& jrelative_url) const;
 
   void AddDefaultHandlers(
       JNIEnv* jenv,
-      const base::android::JavaParamRef<jobject>& jobj,
       const base::android::JavaParamRef<jstring>& jdirectory_path);
 
-  void SetSSLConfig(JNIEnv* jenv,
-                    const base::android::JavaParamRef<jobject>& jobj,
-                    jint jserver_certificate);
+  void SetSSLConfig(JNIEnv* jenv, jint jserver_certificate);
 
-  void RegisterRequestHandler(JNIEnv* jenv,
-                              const base::android::JavaParamRef<jobject>& jobj,
-                              jlong handler);
+  void RegisterRequestHandler(JNIEnv* jenv, jlong handler);
 
   void ServeFilesFromDirectory(
       JNIEnv* env,
-      const base::android::JavaParamRef<jobject>& jobj,
       const base::android::JavaParamRef<jstring>& jdirectory_path);
 
  private:

testing/android/native_test/BUILD.gn

@@ -45,12 +45,14 @@ source_set("native_test_native_code") {
 
 android_library("native_main_runner_java") {
   testonly = true
+  annotation_processor_deps = [ "//base/android/jni_generator:jni_processor" ]
   sources = [ "java/src/org/chromium/native_test/MainRunner.java" ]
   deps = [ "//base:jni_java" ]
 }
 
 android_library("native_test_java") {
   testonly = true
+  annotation_processor_deps = [ "//base/android/jni_generator:jni_processor" ]
   deps = [
     ":native_main_runner_java",
     "//base:base_java",
@@ -61,7 +63,6 @@ android_library("native_test_java") {
     "//testing/android/reporter:reporter_java",
     "//third_party/androidx:androidx_fragment_fragment_java",
   ]
-  annotation_processor_deps = [ "//base/android/jni_generator:jni_processor" ]
   sources = [
     "java/src/org/chromium/native_test/NativeBrowserTest.java",
     "java/src/org/chromium/native_test/NativeBrowserTestActivity.java",

testing/android/native_test/java/src/org/chromium/native_test/MainRunner.java

@@ -5,6 +5,7 @@
 package org.chromium.native_test;
 
 import org.chromium.base.annotations.JNINamespace;
+import org.chromium.base.annotations.NativeMethods;
 
 /**
  * This class provides a way to run the native main method.
@@ -20,7 +21,11 @@ public final class MainRunner {
 
     // Maps the file descriptors and executes the main method with the passed in command line.
     public static int runMain(String[] commandLine) {
-        return nativeRunMain(commandLine);
+        return MainRunnerJni.get().runMain(commandLine);
+    }
+
+    @NativeMethods
+    interface Natives {
+        int runMain(String[] commandLine);
     }
-    private static native int nativeRunMain(String[] commandLine);
 }

testing/android/native_test/java/src/org/chromium/native_test/NativeTest.java

@@ -16,6 +16,7 @@ import android.system.Os;
 
 import org.chromium.base.Log;
 import org.chromium.base.annotations.JNINamespace;
+import org.chromium.base.annotations.NativeMethods;
 import org.chromium.base.test.util.UrlUtils;
 import org.chromium.build.gtest_apk.NativeTestIntent;
 import org.chromium.test.reporter.TestStatusReporter;
@@ -173,8 +174,8 @@ public class NativeTest {
     }
 
     private void runTests(Activity activity) {
-        nativeRunTests(mCommandLineFlags.toString(), mCommandLineFilePath, mStdoutFilePath,
-                activity.getApplicationContext(), UrlUtils.getIsolatedTestRoot());
+        NativeTestJni.get().runTests(mCommandLineFlags.toString(), mCommandLineFilePath,
+                mStdoutFilePath, activity.getApplicationContext(), UrlUtils.getIsolatedTestRoot());
         activity.finish();
         mReporter.testRunFinished(Process.myPid());
     }
@@ -186,6 +187,9 @@ public class NativeTest {
         Log.e(TAG, "[ RUNNER_FAILED ] could not load native library");
     }
 
-    private native void nativeRunTests(String commandLineFlags, String commandLineFilePath,
-            String stdoutFilePath, Context appContext, String testDataDir);
+    @NativeMethods
+    interface Natives {
+        void runTests(String commandLineFlags, String commandLineFilePath, String stdoutFilePath,
+                Context appContext, String testDataDir);
+    }
 }

testing/android/native_test/native_test_launcher.cc

@@ -77,7 +77,6 @@ void AndroidLog(int priority, const char* format, ...) {
 
 static void JNI_NativeTest_RunTests(
     JNIEnv* env,
-    const JavaParamRef<jobject>& obj,
     const JavaParamRef<jstring>& jcommand_line_flags,
     const JavaParamRef<jstring>& jcommand_line_file_path,
     const JavaParamRef<jstring>& jstdout_file_path,

url/BUILD.gn

@@ -303,6 +303,7 @@ if (is_android) {
 
   android_library("android_test_helper_java") {
     testonly = true
+    annotation_processor_deps = [ "//base/android/jni_generator:jni_processor" ]
     sources = [
       "android/javatests/src/org/chromium/url/GURLJavaTestHelper.java",
       "android/javatests/src/org/chromium/url/OriginJavaTestHelper.java",

url/android/javatests/src/org/chromium/url/GURLJavaTestHelper.java

@@ -6,6 +6,7 @@ package org.chromium.url;
 
 import org.chromium.base.annotations.CalledByNative;
 import org.chromium.base.annotations.JNINamespace;
+import org.chromium.base.annotations.NativeMethods;
 
 /**
  * Helpers for GURLJavaTest that need to call into native code.
@@ -17,6 +18,17 @@ public class GURLJavaTestHelper {
         return new GURL(uri);
     }
 
-    public static native void nativeInitializeICU();
-    public static native void nativeTestGURLEquivalence();
+    public static void nativeInitializeICU() {
+        GURLJavaTestHelperJni.get().initializeICU();
+    }
+
+    public static void nativeTestGURLEquivalence() {
+        GURLJavaTestHelperJni.get().testGURLEquivalence();
+    }
+
+    @NativeMethods
+    interface Natives {
+        void initializeICU();
+        void testGURLEquivalence();
+    }
 }

url/android/javatests/src/org/chromium/url/OriginJavaTest.java

@@ -32,7 +32,7 @@ public class OriginJavaTest {
     @SmallTest
     @Test
     public void testOriginEquivalence() {
-        OriginJavaTestHelper.nativeTestOriginEquivalence();
+        OriginJavaTestHelper.testOriginEquivalence();
     }
 
     @SmallTest

url/android/javatests/src/org/chromium/url/OriginJavaTestHelper.java

@@ -5,11 +5,19 @@
 package org.chromium.url;
 
 import org.chromium.base.annotations.JNINamespace;
+import org.chromium.base.annotations.NativeMethods;
 
 /**
  * Helpers for OriginJavaTest that need to call into native code.
  */
 @JNINamespace("url")
 public class OriginJavaTestHelper {
-    public static native void nativeTestOriginEquivalence();
+    public static void testOriginEquivalence() {
+        OriginJavaTestHelperJni.get().testOriginEquivalence();
+    }
+
+    @NativeMethods
+    interface Natives {
+        void testOriginEquivalence();
+    }
 }