Add gapless playback support for AAC playback.

media/filters/frame_processor.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_FILTERS_FRAME_PROCESSOR_H_
 #define MEDIA_FILTERS_FRAME_PROCESSOR_H_
 
 #include "base/basictypes.h"
 #include "base/callback_forward.h"
 #include "base/time/time.h"
@@ skipping 17 matching lines @@
                              const StreamParser::BufferQueue& video_buffers,
                              const StreamParser::TextBufferQueueMap& text_map,
                              base::TimeDelta append_window_start,
                              base::TimeDelta append_window_end,
                              bool* new_media_segment,
                              base::TimeDelta* timestamp_offset) OVERRIDE;
 
  private:
   // Helper that processes one frame with the coded frame processing algorithm.
   // Returns false on error or true on success.
-  bool ProcessFrame(scoped_refptr<StreamParserBuffer> frame,
+  bool ProcessFrame(const scoped_refptr<StreamParserBuffer>& frame,
                     base::TimeDelta append_window_start,
                     base::TimeDelta append_window_end,
                     base::TimeDelta* timestamp_offset,
                     bool* new_media_segment);
 
   // Sets the need random access point flag on all track buffers to true.
   void SetAllTrackBuffersNeedRandomAccessPoint();
 
   // Tracks the MSE coded frame processing variable of same name. It stores the
   // highest coded frame end timestamp across all coded frames in the current
   // coded frame group. It is set to 0 when the SourceBuffer object is created
   // and gets updated by ProcessFrames().
   base::TimeDelta group_end_timestamp_;
 
   UpdateDurationCB update_duration_cb_;
 
   DISALLOW_COPY_AND_ASSIGN(FrameProcessor);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_FILTERS_FRAME_PROCESSOR_H_