Enables fullscreen subtitle and media control from Blink

In detail, this patch does the following things:
- Move the Blink SurfaceView on top of ContentVideoView
- Enable necessary bits on the compositor to make background transparent,
  and enables alpha blending.
- Introduce a new command-line flag to enable the new mode. The old-style
  Java media control are moved to ContentVideoViewLegacy, which is enabled
  by default.

To enable the blink-based media control, do the following:
adb shell
sudo echo chrome --enable-overlay-fullscreen-video-subtitle > /data/local/chrome-command-line

R=
BUG=262945

Review URL: https://codereview.chromium.org/25040002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@243743 0039d316-1c4b-4281-b951-d872f2087c98

2 files changed, 23 insertions, 1 deletions

diff --git a/content/shell/android/java/src/org/chromium/content_shell/ShellManager.java b/content/shell/android/java/src/org/chromium/content_shell/ShellManager.java
index aad1197..c1f1e3d 100644
--- a/content/shell/android/java/src/org/chromium/content_shell/ShellManager.java
+++ b/content/shell/android/java/src/org/chromium/content_shell/ShellManager.java
@@ -85,6 +85,15 @@ public class ShellManager extends FrameLayout {
         nativeLaunchShell(url);
     }
 
+    /**
+     * Enter or leave overlay video mode.
+     * @param enabled Whether overlay mode is enabled.
+     */
+    public void setOverlayVideoMode(boolean enabled) {
+        if (mContentViewRenderView == null) return;
+        mContentViewRenderView.setOverlayVideoMode(enabled);
+    }
+
     @SuppressWarnings("unused")
     @CalledByNative
     private Object createShell() {
diff --git a/content/shell/android/shell_apk/src/org/chromium/content_shell_apk/ContentShellActivity.java b/content/shell/android/shell_apk/src/org/chromium/content_shell_apk/ContentShellActivity.java
index e055d7b..505ae86 100644
--- a/content/shell/android/shell_apk/src/org/chromium/content_shell_apk/ContentShellActivity.java
+++ b/content/shell/android/shell_apk/src/org/chromium/content_shell_apk/ContentShellActivity.java
@@ -10,6 +10,7 @@ import android.os.Bundle;
 import android.text.TextUtils;
 import android.util.Log;
 import android.view.KeyEvent;
+import android.view.View;
 import android.widget.Toast;
 
 import org.chromium.base.BaseSwitches;
@@ -118,7 +119,19 @@ public class ContentShellActivity extends Activity {
         getActiveContentView().setContentViewClient(new ContentViewClient() {
             @Override
             public ContentVideoViewClient getContentVideoViewClient() {
-                return new ActivityContentVideoViewClient(ContentShellActivity.this);
+                return new ActivityContentVideoViewClient(ContentShellActivity.this) {
+                    @Override
+                    public void onShowCustomView(View view) {
+                        super.onShowCustomView(view);
+                        mShellManager.setOverlayVideoMode(true);
+                    }
+
+                    @Override
+                    public void onDestroyContentVideoView() {
+                        super.onDestroyContentVideoView();
+                        mShellManager.setOverlayVideoMode(false);
+                    }
+                };
             }
         });
     }