Extract media::Clock::IsPlaying() into media::Pipeline::ClockState enum.

media/base/clock.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_CLOCK_H_
 #define MEDIA_BASE_CLOCK_H_
 
 #include "base/basictypes.h"
 #include "base/time/time.h"
 #include "media/base/media_export.h"
@@ skipping 52 matching lines @@
   void SetMaxTime(base::TimeDelta max_time);
 
   // Returns the current elapsed media time. Returns 0 if SetDuration() has
   // never been called.
   base::TimeDelta Elapsed();
 
   // Sets the duration of the video. Clock expects the duration will be set
   // exactly once.
   void SetDuration(base::TimeDelta duration);
 
-  // Resets clock to an uninitialized state.
-  void Reset();
-
-  // Notifies the clock that the end of stream has been reached. The clock state
-  // is updated accordingly.
-  void EndOfStream();
-
   // Returns the duration of the clock, or 0 if not set.
   base::TimeDelta Duration() const;
 
  private:
   // Updates the reference points based on the current calculated time.
   void UpdateReferencePoints();
 
   // Updates the reference points based on the given |current_time|.
   void UpdateReferencePoints(base::TimeDelta current_time);
 
@@ skipping 32 matching lines @@
 
   // Duration of the media.
   base::TimeDelta duration_;
 
   DISALLOW_COPY_AND_ASSIGN(Clock);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_BASE_CLOCK_H_