Switch to using media::TimeSource inside media::RendererImpl.

media/base/renderer.h

 // Copyright 2014 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_RENDERER_H_
 #define MEDIA_BASE_RENDERER_H_
 
 #include "base/callback.h"
 #include "base/time/time.h"
 #include "media/base/buffering_state.h"
@@ skipping 19 matching lines @@
   //
   // Permanent callbacks:
   // - |statistics_cb|: Executed periodically with rendering statistics.
   // - |time_cb|: Executed whenever time has advanced through rendering.
   // - |ended_cb|: Executed when rendering has reached the end of stream.
   // - |error_cb|: Executed if any error was encountered during rendering.
   virtual void Initialize(const base::Closure& init_cb,
                           const StatisticsCB& statistics_cb,
                           const base::Closure& ended_cb,
                           const PipelineStatusCB& error_cb,
-                          const BufferingStateCB& buffering_state_cb,
-                          const TimeDeltaCB& get_duration_cb) = 0;
+                          const BufferingStateCB& buffering_state_cb) = 0;
 
   // The following functions must be called after Initialize().
 
   // Discards any buffered data, executing |flush_cb| when completed.
   virtual void Flush(const base::Closure& flush_cb) = 0;
 
   // Starts rendering from |time|.
   virtual void StartPlayingFrom(base::TimeDelta time) = 0;
 
   // Updates the current playback rate. The default playback rate should be 1.
@@ skipping 14 matching lines @@
   // Associates the |cdm| with this Renderer.
   virtual void SetCdm(MediaKeys* cdm) = 0;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(Renderer);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_BASE_RENDERER_H_