Adding new media controls to MediaNotification

content/browser/android/web_contents_observer_proxy.h

Index: content/browser/android/web_contents_observer_proxy.h
diff --git a/content/browser/android/web_contents_observer_proxy.h b/content/browser/android/web_contents_observer_proxy.h
index c6ab66ebd0bb5db648209aff97379fb5f52e2ae3..b85f41947e722e4509d93c3555bdf92d8abb26a6 100644
--- a/content/browser/android/web_contents_observer_proxy.h
+++ b/content/browser/android/web_contents_observer_proxy.h
@@ -78,6 +78,10 @@ class WebContentsObserverProxy : public WebContentsObserver {
                                 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;
   void SetToBaseURLForDataURLIfNeeded(std::string* url);
 
   void DidFailLoadInternal(bool is_provisional_load,