Fix two notification update issues on page navigation

content/browser/media/session/media_session_service_impl.h

Index: content/browser/media/session/media_session_service_impl.h
diff --git a/content/browser/media/session/media_session_service_impl.h b/content/browser/media/session/media_session_service_impl.h
index 03113849082c18559df69e4003463366116d60ec..edcca6dc052647a3c3eb35b607fbbc69a69d4e0a 100644
--- a/content/browser/media/session/media_session_service_impl.h
+++ b/content/browser/media/session/media_session_service_impl.h
@@ -36,6 +36,8 @@ class CONTENT_EXPORT MediaSessionServiceImpl
     return actions_;
   }
 
+  void DidFinishNavigation();
+
   // blink::mojom::MediaSessionService implementation.
   void SetClient(blink::mojom::MediaSessionClientPtr client) override;
 
@@ -53,6 +55,8 @@ class CONTENT_EXPORT MediaSessionServiceImpl
 
   void Bind(blink::mojom::MediaSessionServiceRequest request);
 
+  void ClearActions();
+
   const int render_frame_process_id_;
   const int render_frame_routing_id_;