[MediaSession, Test] Move MediaSession test data to all-platforms directory

Since MediaSession is no longer Android-only, this CL moves the test
data out from the android/ test directory.

BUG=587471

Review URL: https://codereview.chromium.org/1862203003

Cr-Commit-Position: refs/heads/master@{#386056}

chrome/android/javatests/src/org/chromium/chrome/browser/media/ui/PauseOnHeadsetUnplugTest.java

@@ -28,7 +28,7 @@ import java.util.concurrent.TimeoutException;
 @CommandLineFlags.Add(ContentSwitches.DISABLE_GESTURE_REQUIREMENT_FOR_MEDIA_PLAYBACK)
 public class PauseOnHeadsetUnplugTest extends ChromeActivityTestCaseBase<ChromeActivity> {
     private static final String TEST_PATH =
-            "/content/test/data/android/media/media-session.html";
+            "/content/test/data/media/session/media-session.html";
     private static final String VIDEO_ID = "long-video";
 
     private EmbeddedTestServer mTestServer;

chrome/chrome_public_test_apk.isolate

@@ -21,8 +21,8 @@
           '<(DEPTH)/chrome/test/data/webapps/',
           '<(DEPTH)/chrome/test/media_router/resources/',
           '<(DEPTH)/content/test/data/android/geolocation.html',
-          '<(DEPTH)/content/test/data/android/media/',
           '<(DEPTH)/content/test/data/media/getusermedia.html',
+          '<(DEPTH)/content/test/data/media/session/',
           '<(DEPTH)/content/test/data/media/webrtc_test_utilities.js',
         ],
       },

content/browser/media/session/media_session_visibility_browsertest.cc

@@ -70,7 +70,7 @@ class MediaSessionVisibilityBrowserTest
 
   void LoadTestPage() {
     TestNavigationObserver navigation_observer(shell()->web_contents(), 1);
-    shell()->LoadURL(GetTestUrl("android/media", "media-session.html"));
+    shell()->LoadURL(GetTestUrl("media/session", "media-session.html"));
     navigation_observer.Wait();
   }
 

content/content_shell_test_apk.isolate

@@ -7,6 +7,7 @@
       'variables': {
         'files': [
           '<(DEPTH)/content/test/data/android/',
+          '<(DEPTH)/content/test/data/media/session/',
           '<(DEPTH)/net/data/ssl/certificates/crit-codeSigning-chain.pem',
           '<(DEPTH)/net/data/ssl/certificates/eku-test-root.pem',
           '<(DEPTH)/net/data/ssl/certificates/invalid_key_usage_cert.der',

content/public/android/javatests/src/org/chromium/content/browser/MediaSessionTest.java

@@ -26,7 +26,7 @@ import java.util.concurrent.Callable;
 @CommandLineFlags.Add(ContentSwitches.DISABLE_GESTURE_REQUIREMENT_FOR_MEDIA_PLAYBACK)
 public class MediaSessionTest extends ContentShellTestBase {
     private static final String MEDIA_SESSION_TEST_URL =
-            "content/test/data/android/media/media-session.html";
+            "content/test/data/media/session/media-session.html";
     private static final String VERY_SHORT_AUDIO = "very-short-audio";
     private static final String SHORT_AUDIO = "short-audio";
     private static final String LONG_AUDIO = "long-audio";