Add WebMediaPlayer::timelineOffset() support to WebMediaPlayerImpl.

content/renderer/media/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 CONTENT_RENDERER_MEDIA_WEBMEDIAPLAYER_IMPL_H_
 #define CONTENT_RENDERER_MEDIA_WEBMEDIAPLAYER_IMPL_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 89 matching lines @@
   virtual bool hasVideo() const;
   virtual bool hasAudio() const;
 
   // Dimensions of the video.
   virtual blink::WebSize naturalSize() const;
 
   // Getters of playback state.
   virtual bool paused() const;
   virtual bool seeking() const;
   virtual double duration() const;
+  virtual double timelineOffset() const;
   virtual double currentTime() const;
 
   // Internal states of loading and network.
   // TODO(hclam): Ask the pipeline about the state rather than having reading
   // them from members which would cause race conditions.
   virtual blink::WebMediaPlayer::NetworkState networkState() const;
   virtual blink::WebMediaPlayer::ReadyState readyState() const;
 
   // TODO(sandersd): Change this to non-const in blink::WebMediaPlayer.
   // http://crbug.com/360251
@@ skipping 227 matching lines @@
   WebContentDecryptionModuleImpl* web_cdm_;
 
   media::DecryptorReadyCB decryptor_ready_cb_;
 
   DISALLOW_COPY_AND_ASSIGN(WebMediaPlayerImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_MEDIA_WEBMEDIAPLAYER_IMPL_H_