Reland "Adding media controls to MediaNotification"

content/browser/media/session/media_session_android.h

Index: content/browser/media/session/media_session_android.h
diff --git a/content/browser/media/session/media_session_android.h b/content/browser/media/session/media_session_android.h
index fb3644070faa44a7d9e19ad1e5e2fe69ce4d1bb5..2b403197cd6d6566434ce6f86d0dced8349dc412 100644
--- a/content/browser/media/session/media_session_android.h
+++ b/content/browser/media/session/media_session_android.h
@@ -39,11 +39,18 @@ class MediaSessionAndroid final : public MediaSessionObserver {
                                 bool is_suspended) override;
   void MediaSessionMetadataChanged(
       const base::Optional<MediaMetadata>& metadata) override;
+  void MediaSessionEnabledAction(
+      blink::mojom::MediaSessionAction action) override;
+  void MediaSessionDisabledAction(
+      blink::mojom::MediaSessionAction action) override;
 
   // MediaSession method wrappers.
   void Resume(JNIEnv* env, const base::android::JavaParamRef<jobject>& j_obj);
   void Suspend(JNIEnv* env, const base::android::JavaParamRef<jobject>& j_obj);
   void Stop(JNIEnv* env, const base::android::JavaParamRef<jobject>& j_obj);
+  void DidReceiveAction(JNIEnv* env,
+                        const base::android::JavaParamRef<jobject>& j_obj,
+                        jint action);
 
  private:
   WebContentsAndroid* GetWebContentsAndroid();