Add media controls in media notification

chrome/android/java/src/org/chromium/chrome/browser/media/ui/MediaNotificationListener.java

Index: chrome/android/java/src/org/chromium/chrome/browser/media/ui/MediaNotificationListener.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/media/ui/MediaNotificationListener.java b/chrome/android/java/src/org/chromium/chrome/browser/media/ui/MediaNotificationListener.java
index ecc488f0c1456241d9c03c6869ed244fa60a7251..8b893e3c2d4ac695ef9b05e4ea09de11a2e6e65d 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/media/ui/MediaNotificationListener.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/media/ui/MediaNotificationListener.java
@@ -42,4 +42,10 @@ public interface MediaNotificationListener {
      * @param actionSource The source the listener got the action from.
      */
     void onStop(int actionSource);
+
+    /**
+     * Called when the user initiated a MediaSessionAction.

[whywhat, 2016/10/24 20:54:01]

nit: a MediaSessionAction doesn't explain anything (and it's not even a {@link
}).
Something like "Called when user performed one of the supported media actions
(like fast forward or next track)" sounds better IMHO.

[Zhiqiang Zhang (Slow), 2016/10/25 12:45:35]

Done.

+     * @param action The kind of the initated action.
+     */
+    void onMediaSessionAction(MediaSessionAction action);
 }