Adding new media controls to MediaNotification

content/browser/web_contents/web_contents_impl.h

Index: content/browser/web_contents/web_contents_impl.h
diff --git a/content/browser/web_contents/web_contents_impl.h b/content/browser/web_contents/web_contents_impl.h
index 2b04a84c62e30233fca4bd95a103410102f11282..6dbe3abb1d2586a2a7ec358a9aa74cc1b4f7a893 100644
--- a/content/browser/web_contents/web_contents_impl.h
+++ b/content/browser/web_contents/web_contents_impl.h
@@ -431,12 +431,25 @@ class CONTENT_EXPORT WebContentsImpl
   bool GetAllowOtherViews() override;
 #endif
 
+  // TODO(zqzhang): Decouple MediaSession messages from WebContents to avoid
+  // plumbing. See https://crbug.com/658678
+  //
   // This method is called when the MediaSession state has changed, and will
   // notify the WebContents observers.
   void OnMediaSessionStateChanged();
   // This method is called when the MediaSession metadata has changed, and will
   // notify the WebContents observers.
   void OnMediaSessionMetadataChanged();
+  // This method is called when the MediaSession has enabled an action, and will
+  // notify the WebContentsObservers.
+  void OnMediaSessionEnabledAction(blink::mojom::MediaSessionAction action);
+  // This method is called when the MediaSession has disabled an action, and
+  // will
+  // notify the WebContentsObservers.
+  void OnMediaSessionDisabledAction(blink::mojom::MediaSessionAction action);
+  // Tell the media session a user action has performed.
+  void DidReceiveMediaSessionAction(
+      blink::mojom::MediaSessionAction action);
 
   // Implementation of PageNavigator.
   WebContents* OpenURL(const OpenURLParams& params) override;