Convert //chromecast from scoped_ptr to std::unique_ptr

chromecast/media/audio/cast_audio_manager.cc

 // 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.
 
 #include "chromecast/media/audio/cast_audio_manager.h"
 
 #include <algorithm>
 #include <string>
 
 #include "chromecast/media/audio/cast_audio_output_stream.h"
@@ skipping 43 matching lines @@
 
 ::media::AudioParameters CastAudioManager::GetInputStreamParameters(
     const std::string& device_id) {
   LOG(WARNING) << "No support for input audio devices";
   // Need to send a valid AudioParameters object even when it will unused.
   return ::media::AudioParameters(
       ::media::AudioParameters::AUDIO_PCM_LOW_LATENCY,
       ::media::CHANNEL_LAYOUT_STEREO, 48000, 16, 1024);
 }
 
-scoped_ptr<MediaPipelineBackend> CastAudioManager::CreateMediaPipelineBackend(
+std::unique_ptr<MediaPipelineBackend>
+CastAudioManager::CreateMediaPipelineBackend(
     const MediaPipelineDeviceParams& params) {
   return backend_manager_->CreateMediaPipelineBackend(params);
 }
 
 ::media::AudioOutputStream* CastAudioManager::MakeLinearOutputStream(
     const ::media::AudioParameters& params) {
   DCHECK_EQ(::media::AudioParameters::AUDIO_PCM_LINEAR, params.format());
   return new CastAudioOutputStream(params, this);
 }
 
@@ skipping 37 matching lines @@
   }
 
   ::media::AudioParameters output_params(
       ::media::AudioParameters::AUDIO_PCM_LOW_LATENCY, channel_layout,
       sample_rate, bits_per_sample, buffer_size);
   return output_params;
 }
 
 }  // namespace media
 }  // namespace chromecast