Replace scoped_ptr with std::unique_ptr in //media/base.

media/base/android/audio_media_codec_decoder.h

 // Copyright 2015 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_ANDROID_AUDIO_MEDIA_CODEC_DECODER_H_
 #define MEDIA_BASE_ANDROID_AUDIO_MEDIA_CODEC_DECODER_H_
 
 #include <stddef.h>
 #include <stdint.h>
+#include <memory>
 
 #include "base/macros.h"
 #include "media/base/android/media_codec_decoder.h"
 
 namespace media {
 
 class AudioTimestampHelper;
 
 // Audio decoder for MediaCodecPlayer
 class AudioMediaCodecDecoder : public MediaCodecDecoder {
@@ skipping 60 matching lines @@
   // The sampling rate received from decoder.
   int output_sampling_rate_;
 
   // Frame count to sync with audio codec output.
   int64_t frame_count_;
 
   // Base timestamp for the |audio_timestamp_helper_|.
   base::TimeDelta base_timestamp_;
 
   // Object to calculate the current audio timestamp for A/V sync.
-  scoped_ptr<AudioTimestampHelper> audio_timestamp_helper_;
+  std::unique_ptr<AudioTimestampHelper> audio_timestamp_helper_;
 
   // Reports current playback time to the callee.
   SetTimeCallback update_current_time_cb_;
 
   // The time limit for the next frame to avoid underrun.
   base::TimeTicks next_frame_time_limit_;
 
   DISALLOW_COPY_AND_ASSIGN(AudioMediaCodecDecoder);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_BASE_ANDROID_AUDIO_MEDIA_CODEC_DECODER_H_