Add WebMediaPlayer::timelineOffset() support to WebMediaPlayerImpl.

media/base/pipeline.h

 // Copyright (c) 2012 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_BASE_PIPELINE_H_
 #define MEDIA_BASE_PIPELINE_H_
 
 #include <string>
 
 #include "base/gtest_prod_util.h"
@@ skipping 23 matching lines @@
 class TextTrackConfig;
 class VideoRenderer;
 
 // Metadata describing a pipeline once it has been initialized.
 struct PipelineMetadata {
   PipelineMetadata() : has_audio(false), has_video(false) {}
 
   bool has_audio;
   bool has_video;
   gfx::Size natural_size;
+  base::Time timeline_offset;
 };
 
 typedef base::Callback<void(PipelineMetadata)> PipelineMetadataCB;
 
 // Pipeline runs the media pipeline.  Filters are created and called on the
 // task runner injected into this object. Pipeline works like a state
 // machine to perform asynchronous initialization, pausing, seeking and playing.
 //
 // Here's a state diagram that describes the lifetime of this object.
 //
@@ skipping 367 matching lines @@
   scoped_ptr<SerialRunner> pending_callbacks_;
 
   base::ThreadChecker thread_checker_;
 
   DISALLOW_COPY_AND_ASSIGN(Pipeline);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_BASE_PIPELINE_H_