Fix media timeline so that thumb never exceeds buffered data

media/filters/video_renderer_base.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_FILTERS_VIDEO_RENDERER_BASE_H_
 #define MEDIA_FILTERS_VIDEO_RENDERER_BASE_H_
 
 #include <deque>
 
 #include "base/memory/scoped_ptr.h"
@@ skipping 35 matching lines @@
   // Filter implementation.
   virtual void Play(const base::Closure& callback) OVERRIDE;
   virtual void Pause(const base::Closure& callback) OVERRIDE;
   virtual void Flush(const base::Closure& callback) OVERRIDE;
   virtual void Stop(const base::Closure& callback) OVERRIDE;
   virtual void SetPlaybackRate(float playback_rate) OVERRIDE;
   virtual void Seek(base::TimeDelta time, const FilterStatusCB& cb) OVERRIDE;
 
   // VideoRenderer implementation.
   virtual void Initialize(VideoDecoder* decoder,
-                          const base::Closure& callback,
-                          const StatisticsCallback& stats_callback) OVERRIDE;
+                          const base::Closure& init_cb,
+                          const StatisticsCallback& stats_callback,
+                          const VideoTimeCB& video_time_cb) OVERRIDE;
   virtual bool HasEnded() OVERRIDE;
 
   // PlatformThread::Delegate implementation.
   virtual void ThreadMain() OVERRIDE;
 
   // Clients of this class (painter/compositor) should use GetCurrentFrame()
   // obtain ownership of VideoFrame, it should always relinquish the ownership
   // by use PutCurrentFrame(). Current frame is not guaranteed to be non-NULL.
   // It expects clients to use color-fill the background if current frame
   // is NULL. This could happen before pipeline is pre-rolled or during
@@ skipping 109 matching lines @@
   bool pending_read_;
   bool pending_paint_;
   bool pending_paint_with_last_available_;
 
   float playback_rate_;
 
   // Filter callbacks.
   base::Closure flush_callback_;
   FilterStatusCB seek_cb_;
   StatisticsCallback statistics_callback_;
+  VideoTimeCB video_time_cb_;
 
   base::TimeDelta seek_timestamp_;
 
   VideoDecoder::ReadCB read_cb_;
 
   // Embedder callback for notifying a new frame is available for painting.
   base::Closure paint_cb_;
 
   // Callback to execute to inform the player if the video decoder's output is
   // opaque.
   SetOpaqueCB set_opaque_cb_;
 
   DISALLOW_COPY_AND_ASSIGN(VideoRendererBase);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_FILTERS_VIDEO_RENDERER_BASE_H_