Split MediaSessionStateChanged() and MediaSessionMetadataChanged()

chromecast/browser/cast_media_blocker.h

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROMECAST_BROWSER_CAST_MEDIA_BLOCKER_H_
 #define CHROMECAST_BROWSER_CAST_MEDIA_BLOCKER_H_
 
 #include "base/macros.h"
 #include "content/public/browser/web_contents_observer.h"
 
@@ skipping 23 matching lines @@
   virtual void UpdateMediaBlockedState();
 
  private:
   enum BlockState {
     BLOCKED,     // All media playback should be blocked.
     UNBLOCKING,  // Media playback should be resumed at next oppurtunity.
     UNBLOCKED,   // Media playback should not be blocked.
   };
 
   // content::WebContentsObserver implementation:
-  void MediaSessionStateChanged(
-      bool is_controllable,
-      bool is_suspended,
-      const base::Optional<content::MediaMetadata>& metadata) override;
+  void MediaSessionStateChanged(bool is_controllable,
+                                bool is_suspended) override;
 
   // Whether or not media in the app can be controlled and if media is currently
   // suspended. These variables cache arguments from MediaSessionStateChanged().
   bool controllable_;
   bool suspended_;
 
   BlockState state_;
 
   DISALLOW_COPY_AND_ASSIGN(CastMediaBlocker);
 };
 
 }  // namespace shell
 }  // namespace chromecast
 
 #endif  // CHROMECAST_BROWSER_CAST_MEDIA_BLOCKER_H_