Remove duration from media::Clock.

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 336 matching lines @@
   // Current volume level (from 0.0f to 1.0f).  This value is set immediately
   // via SetVolume() and a task is dispatched on the task runner to notify the
   // filters.
   float volume_;
 
   // Current playback rate (>= 0.0f).  This value is set immediately via
   // SetPlaybackRate() and a task is dispatched on the task runner to notify
   // the filters.
   float playback_rate_;
 
+  // Current duration as reported by |demuxer_|.
+  base::TimeDelta duration_;
+
   // base::TickClock used by |clock_|.
   base::DefaultTickClock default_tick_clock_;
 
   // Reference clock.  Keeps track of current playback time.  Uses system
   // clock and linear interpolation, but can have its time manually set
   // by filters.
   scoped_ptr<Clock> clock_;
 
   enum ClockState {
     // Audio (if present) is not rendering. Clock isn't playing.
@@ skipping 63 matching lines @@
   bool underflow_disabled_for_testing_;
 
   base::ThreadChecker thread_checker_;
 
   DISALLOW_COPY_AND_ASSIGN(Pipeline);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_BASE_PIPELINE_H_