Implement MediaSession on top of the WebMediaPlayerDelegate.

media/blink/webmediaplayer_impl.h

 // Copyright 2013 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 MEDIA_BLINK_WEBMEDIAPLAYER_IMPL_H_
 #define MEDIA_BLINK_WEBMEDIAPLAYER_IMPL_H_
 
 #include <stdint.h>
 
 #include <string>
@@ skipping 170 matching lines @@
   void OnPipelineError(PipelineStatus error);
   void OnPipelineMetadata(PipelineMetadata metadata);
   void OnPipelineBufferingStateChanged(BufferingState buffering_state);
   void OnDemuxerOpened();
   void OnAddTextTrack(const TextTrackConfig& config,
                       const AddTextTrackDoneCB& done_cb);
 
   // WebMediaPlayerDelegate::Observer implementation.
   void OnHidden() override;
   void OnShown() override;
+  void OnPlay() override;
+  void OnPause() override;
 
  private:
   // Initiate suspending the pipeline.
   void Suspend();
 
   // Initiate resuming the pipeline.
   void Resume();
 
   // Called after |defer_load_cb_| has decided to allow the load. If
   // |defer_load_cb_| is null this is called immediately.
@@ skipping 200 matching lines @@
   bool is_cdm_attached_;
 
   scoped_ptr<RendererFactory> renderer_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(WebMediaPlayerImpl);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_BLINK_WEBMEDIAPLAYER_IMPL_H_