Adding new media controls to MediaNotification

content/public/android/java/src/org/chromium/content_public/browser/MediaSessionObserver.java

Index: content/public/android/java/src/org/chromium/content_public/browser/MediaSessionObserver.java
diff --git a/content/public/android/java/src/org/chromium/content_public/browser/MediaSessionObserver.java b/content/public/android/java/src/org/chromium/content_public/browser/MediaSessionObserver.java
index 5cf0542856e38be2d44d104d6c572b3f2e744172..8f2d5bf5520d2e1f3f83ef2eebe6f34d99f50dc9 100644
--- a/content/public/android/java/src/org/chromium/content_public/browser/MediaSessionObserver.java
+++ b/content/public/android/java/src/org/chromium/content_public/browser/MediaSessionObserver.java
@@ -56,6 +56,18 @@ public abstract class MediaSessionObserver {
     public void mediaSessionMetadataChanged(MediaMetadata metadata) {}
 
     /**
+     * Called when the observed {@link MediaSession} has enabled an action.
+     * @param action The enabled action.
+     */
+    public void mediaSessionEnabledAction(int action) {}
+
+    /**
+     * Called when the observed {@link MediaSession} has disabled an action.
+     * @param action The disabled action.
+     */
+    public void mediaSessionDisabledAction(int action) {}
+
+    /**
      * Stop observing the {@link MediaSession}.
      *
      * {@link MediaSessionObserver#getMediaSession} will return null after this method is called.