Move kUseMobileUserAgent to //components/embedder_support

This is part of the process of making user_agent_utils.{cc,h} stop
depending on //content.

The flag has been moved to the main "embedder_support" target, which
does not depend on any other target and has other command-line
switches.

Bug: 389970327
Change-Id: Ib646ada998e8ea2eb23be2b9420d8049aa8f0bac
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6242721
Reviewed-by: Dave Tapuska <dtapuska@chromium.org>
Commit-Queue: Raphael Kubo da Costa <kubo@igalia.com>
Reviewed-by: Bo Liu <boliu@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1425012}

android_webview/browser/aw_content_browser_client.cc

@@ -215,7 +215,7 @@ std::string GetUserAgent() {
   // "Version/4.0" had been hardcoded in the legacy WebView.
   std::string product = "Version/4.0 " + GetProduct();
   if (base::CommandLine::ForCurrentProcess()->HasSwitch(
-          switches::kUseMobileUserAgent)) {
+          embedder_support::kUseMobileUserAgent)) {
     product += " Mobile";
   }
 

components/embedder_support/switches.cc

@@ -33,6 +33,9 @@ const char kOriginTrialPublicKey[] = "origin-trial-public-key";
 // Sets the Reporting API delay to under a second to allow much quicker reports.
 const char kShortReportingDelay[] = "short-reporting-delay";
 
+// Set when Chromium should use a mobile user agent.
+const char kUseMobileUserAgent[] = "use-mobile-user-agent";
+
 // A string used to override the default user agent with a custom one.
 const char kUserAgent[] = "user-agent";
 

components/embedder_support/switches.h

@@ -19,6 +19,7 @@ extern const char kOriginTrialDisabledFeatures[];
 extern const char kOriginTrialDisabledTokens[];
 extern const char kOriginTrialPublicKey[];
 extern const char kShortReportingDelay[];
+extern const char kUseMobileUserAgent[];
 extern const char kUserAgent[];
 
 }  // namespace embedder_support

components/embedder_support/user_agent_utils.cc

@@ -26,8 +26,6 @@
 #include "components/policy/core/common/policy_pref_names.h"
 #include "components/prefs/pref_service.h"
 #include "components/version_info/version_info.h"
-#include "content/public/common/content_features.h"
-#include "content/public/common/content_switches.h"
 #include "content/public/common/user_agent.h"
 #include "net/http/http_util.h"
 #include "third_party/blink/public/common/features.h"
@@ -235,9 +233,9 @@ std::string GetUserAgentInternal(
   }
 
 #if BUILDFLAG(IS_ANDROID) || BUILDFLAG(IS_IOS)
-  if (base::CommandLine::ForCurrentProcess()->HasSwitch(
-          switches::kUseMobileUserAgent))
+  if (base::CommandLine::ForCurrentProcess()->HasSwitch(kUseMobileUserAgent)) {
     product += " Mobile";
+  }
 #endif
 
   // In User-Agent reduction phase 5, only apply the <unifiedPlatform> to
@@ -455,8 +453,8 @@ blink::UserAgentMetadata GetUserAgentMetadata(const PrefService* pref_service,
       GetUserAgentBrandMajorVersionListInternal(std::nullopt);
   metadata.mobile = false;
 #if BUILDFLAG(IS_ANDROID) || BUILDFLAG(IS_IOS)
-  metadata.mobile = base::CommandLine::ForCurrentProcess()->HasSwitch(
-      switches::kUseMobileUserAgent);
+  metadata.mobile =
+      base::CommandLine::ForCurrentProcess()->HasSwitch(kUseMobileUserAgent);
 #endif
   metadata.platform = GetPlatformForUAMetadata();
 

components/embedder_support/user_agent_utils_unittest.cc

@@ -405,12 +405,12 @@ TEST_F(UserAgentUtilsTest, UserAgentStringOrdering) {
   base::CommandLine* command_line = scoped_command_line.GetProcessCommandLine();
 
   // Do it for regular devices.
-  ASSERT_FALSE(command_line->HasSwitch(switches::kUseMobileUserAgent));
+  ASSERT_FALSE(command_line->HasSwitch(kUseMobileUserAgent));
   CheckUserAgentStringOrdering(false);
 
   // Do it for mobile devices.
-  command_line->AppendSwitch(switches::kUseMobileUserAgent);
-  ASSERT_TRUE(command_line->HasSwitch(switches::kUseMobileUserAgent));
+  command_line->AppendSwitch(kUseMobileUserAgent);
+  ASSERT_TRUE(command_line->HasSwitch(kUseMobileUserAgent));
   CheckUserAgentStringOrdering(true);
 #else
   CheckUserAgentStringOrdering(false);
@@ -478,13 +478,13 @@ TEST_F(UserAgentUtilsTest, UserAgentStringReduced) {
 
   // Verify the mobile user agent string is not returned when not using a mobile
   // user agent.
-  ASSERT_FALSE(command_line->HasSwitch(switches::kUseMobileUserAgent));
+  ASSERT_FALSE(command_line->HasSwitch(kUseMobileUserAgent));
   EXPECT_EQ(GetUserAgent(), GenerateExpectedUserAgent());
 
   // Verify the mobile user agent string is returned when using a mobile user
   // agent.
-  command_line->AppendSwitch(switches::kUseMobileUserAgent);
-  ASSERT_TRUE(command_line->HasSwitch(switches::kUseMobileUserAgent));
+  command_line->AppendSwitch(kUseMobileUserAgent);
+  ASSERT_TRUE(command_line->HasSwitch(kUseMobileUserAgent));
   EXPECT_EQ(GetUserAgent(), GenerateExpectedUserAgent(kMobileProductSuffix));
 #else
   EXPECT_EQ(GetUserAgent(), GenerateExpectedUserAgent());
@@ -546,7 +546,7 @@ TEST_F(UserAgentUtilsTest, ReduceUserAgentPlatformOsCpu) {
       {blink::features::kReduceUserAgentAndroidVersionDeviceModel});
   // Verify the mobile platform and oscpu user agent string is not reduced when
   // not using a mobile user agent.
-  ASSERT_FALSE(command_line->HasSwitch(switches::kUseMobileUserAgent));
+  ASSERT_FALSE(command_line->HasSwitch(kUseMobileUserAgent));
   {
     EXPECT_NE(GetUserAgent(), GenerateExpectedUserAgent());
     EXPECT_NE(content::GetUnifiedPlatformForTesting().c_str(),
@@ -555,8 +555,8 @@ TEST_F(UserAgentUtilsTest, ReduceUserAgentPlatformOsCpu) {
 
   // Verify the mobile platform and oscpu user agent string is not reduced when
   // using a mobile user agent.
-  command_line->AppendSwitch(switches::kUseMobileUserAgent);
-  ASSERT_TRUE(command_line->HasSwitch(switches::kUseMobileUserAgent));
+  command_line->AppendSwitch(kUseMobileUserAgent);
+  ASSERT_TRUE(command_line->HasSwitch(kUseMobileUserAgent));
   {
     EXPECT_NE(GetUserAgent(), GenerateExpectedUserAgent(kMobileProductSuffix));
   }
@@ -567,7 +567,7 @@ TEST_F(UserAgentUtilsTest, ReduceUserAgentPlatformOsCpu) {
       {blink::features::kReduceUserAgentMinorVersion,
        blink::features::kReduceUserAgentPlatformOsCpu},
       {});
-  ASSERT_FALSE(command_line->HasSwitch(switches::kUseMobileUserAgent));
+  ASSERT_FALSE(command_line->HasSwitch(kUseMobileUserAgent));
   {
     // Verify unified platform user agent is returned.
     EXPECT_EQ(GetUserAgent(), GenerateExpectedUserAgent());
@@ -577,8 +577,8 @@ TEST_F(UserAgentUtilsTest, ReduceUserAgentPlatformOsCpu) {
   // On iOS, also check the kUseMobileUserAgent flag with the features above.
   // This is similar to the Android case above, but we do not care about
   // kReduceUserAgentAndroidVersionDeviceModel here.
-  command_line->AppendSwitch(switches::kUseMobileUserAgent);
-  ASSERT_TRUE(command_line->HasSwitch(switches::kUseMobileUserAgent));
+  command_line->AppendSwitch(kUseMobileUserAgent);
+  ASSERT_TRUE(command_line->HasSwitch(kUseMobileUserAgent));
   {
     EXPECT_EQ(GetUserAgent(), GenerateExpectedUserAgent(kMobileProductSuffix));
   }
@@ -620,7 +620,7 @@ TEST_F(UserAgentUtilsTest, ReduceUserAgentAndroidVersionDeviceModel) {
 
   // Verify the mobile deviceModel and androidVersion in the user agent string
   // is reduced when not using a mobile user agent.
-  ASSERT_FALSE(command_line->HasSwitch(switches::kUseMobileUserAgent));
+  ASSERT_FALSE(command_line->HasSwitch(kUseMobileUserAgent));
   {
     std::string buffer = GetUserAgent();
     EXPECT_EQ("Linux; Android 10; K", GetUserAgentPlatformOsCpu(buffer));
@@ -629,8 +629,8 @@ TEST_F(UserAgentUtilsTest, ReduceUserAgentAndroidVersionDeviceModel) {
 
   // Verify the mobile deviceModel and androidVersion in the user agent string
   // is reduced when using a mobile user agent.
-  command_line->AppendSwitch(switches::kUseMobileUserAgent);
-  ASSERT_TRUE(command_line->HasSwitch(switches::kUseMobileUserAgent));
+  command_line->AppendSwitch(kUseMobileUserAgent);
+  ASSERT_TRUE(command_line->HasSwitch(kUseMobileUserAgent));
   {
     std::string buffer = GetUserAgent();
     EXPECT_EQ("Linux; Android 10; K", GetUserAgentPlatformOsCpu(buffer));

content/app/DEPS

@@ -2,6 +2,7 @@ include_rules = [
   "+chromeos/startup",
   "+components/discardable_memory",
   "+components/download",
+  "+components/embedder_support/switches.h",
   "+components/power_monitor",
   "+components/tracing/common",
   "+content",

content/app/content_main.cc

@@ -39,6 +39,7 @@
 #include "base/trace_event/trace_config.h"
 #include "base/trace_event/trace_log.h"
 #include "build/build_config.h"
+#include "components/embedder_support/switches.h"
 #include "components/tracing/common/trace_to_console.h"
 #include "components/tracing/common/tracing_switches.h"
 #include "content/app/content_main_runner_impl.h"
@@ -308,7 +309,7 @@ NO_STACK_PROTECTOR int RunContentProcess(
 #if BUILDFLAG(IS_IOS)
     base::CommandLine* command_line = base::CommandLine::ForCurrentProcess();
     command_line->AppendSwitch(switches::kEnableViewport);
-    command_line->AppendSwitch(switches::kUseMobileUserAgent);
+    command_line->AppendSwitch(embedder_support::kUseMobileUserAgent);
 #endif
 
 #if BUILDFLAG(IS_TVOS)

content/browser/BUILD.gn

@@ -101,6 +101,7 @@ source_set("browser") {
     "//components/discardable_memory/service",
     "//components/download/database",
     "//components/download/public/common:public",
+    "//components/embedder_support",
     "//components/file_access",
     "//components/filename_generation",
     "//components/input",

content/browser/DEPS

@@ -10,6 +10,7 @@ include_rules = [
   "+components/discardable_memory/service",
   "+components/download/database",
   "+components/download/public/common",
+  "+components/embedder_support/switches.h",
   "+components/file_access",
   "+components/filename_generation",
   "+components/grit",

content/browser/preloading/prefetch/prefetch_network_context.cc

@@ -6,6 +6,7 @@
 
 #include "base/command_line.h"
 #include "base/memory/scoped_refptr.h"
+#include "components/embedder_support/switches.h"
 #include "content/browser/loader/url_loader_factory_utils.h"
 #include "content/browser/preloading/prefetch/prefetch_network_context_client.h"
 #include "content/browser/preloading/prefetch/prefetch_proxy_configurator.h"
@@ -96,7 +97,7 @@ void PrefetchNetworkContext::CreateIsolatedURLLoaderFactory(
   context_params->file_paths = network::mojom::NetworkContextFilePaths::New();
   context_params->user_agent =
       GetReducedUserAgent(base::CommandLine::ForCurrentProcess()->HasSwitch(
-                              switches::kUseMobileUserAgent),
+                              embedder_support::kUseMobileUserAgent),
                           delegate ? delegate->GetMajorVersionNumber() : "");
   // The verifier created here does not have the same parameters as used in the
   // profile (where additional parameters are added in

content/browser/renderer_host/render_process_host_impl.cc

@@ -69,6 +69,7 @@
 #include "base/tracing/protos/chrome_track_event.pbzero.h"
 #include "build/build_config.h"
 #include "cc/base/switches.h"
+#include "components/embedder_support/switches.h"
 #include "components/input/utils.h"
 #include "components/metrics/histogram_controller.h"
 #include "components/metrics/single_sample_metrics.h"
@@ -3447,7 +3448,7 @@ void RenderProcessHostImpl::PropagateBrowserCommandLineToRenderer(
       switches::kUseCmdDecoder,
       switches::kUseFakeCodecForPeerConnection,
       switches::kUseFakeUIForMediaStream,
-      switches::kUseMobileUserAgent,
+      embedder_support::kUseMobileUserAgent,
       switches::kVideoCaptureUseGpuMemoryBuffer,
       switches::kVideoThreads,
       switches::kWaitForDebuggerOnNavigation,

content/public/common/content_switches.cc

@@ -784,9 +784,6 @@ const char kVideoImageTextureTarget[] = "video-image-texture-target";
 const char kUseContextSnapshotSwitch[] = "use-context-snapshot";
 #endif
 
-// Set when Chromium should use a mobile user agent.
-const char kUseMobileUserAgent[] = "use-mobile-user-agent";
-
 // Use the MockCertVerifier. This only works in test code.
 const char kUseMockCertVerifierForTesting[] =
     "use-mock-cert-verifier-for-testing";

content/public/common/content_switches.h

@@ -212,7 +212,6 @@ CONTENT_EXPORT extern const char kVideoImageTextureTarget[];
 #if BUILDFLAG(IS_ANDROID) && BUILDFLAG(INCLUDE_BOTH_V8_SNAPSHOTS)
 CONTENT_EXPORT extern const char kUseContextSnapshotSwitch[];
 #endif
-CONTENT_EXPORT extern const char kUseMobileUserAgent[];
 CONTENT_EXPORT extern const char kUseMockCertVerifierForTesting[];
 extern const char kUtilityCmdPrefix[];
 CONTENT_EXPORT extern const char kUtilityProcess[];

content/shell/BUILD.gn

@@ -315,6 +315,7 @@ static_library("content_shell_lib") {
     "//components/cdm/renderer",
     "//components/custom_handlers",
     "//components/custom_handlers:test_support",
+    "//components/embedder_support",
     "//components/embedder_support:user_agent",
     "//components/input",
     "//components/keyed_service/content",

content/shell/browser/shell_content_browser_client.cc

@@ -34,6 +34,7 @@
 #include "components/custom_handlers/protocol_handler_registry.h"
 #include "components/custom_handlers/protocol_handler_throttle.h"
 #include "components/custom_handlers/simple_protocol_handler_registry_factory.h"
+#include "components/embedder_support/switches.h"
 #include "components/embedder_support/user_agent_utils.h"
 #include "components/metrics/client_info.h"
 #include "components/metrics/metrics_service.h"
@@ -752,7 +753,7 @@ std::string ShellContentBrowserClient::GetUserAgent() {
       base::StringPrintf("Chrome/%s.0.0.0", CONTENT_SHELL_MAJOR_VERSION);
 #if BUILDFLAG(IS_ANDROID) || BUILDFLAG(IS_IOS)
   if (base::CommandLine::ForCurrentProcess()->HasSwitch(
-          switches::kUseMobileUserAgent)) {
+          embedder_support::kUseMobileUserAgent)) {
     product += " Mobile";
   }
 #endif