Convert //media/audio from scoped_ptr to std::unique_ptr

media/audio/fake_audio_input_stream.h

Index: media/audio/fake_audio_input_stream.h
diff --git a/media/audio/fake_audio_input_stream.h b/media/audio/fake_audio_input_stream.h
index b3f1ea4ff875821c5ccf99e443725d43bd125a39..8b42d1f96c39e746cfdccff8a167e518ff327107 100644
--- a/media/audio/fake_audio_input_stream.h
+++ b/media/audio/fake_audio_input_stream.h
@@ -7,11 +7,11 @@
 #ifndef MEDIA_AUDIO_FAKE_AUDIO_INPUT_STREAM_H_
 #define MEDIA_AUDIO_FAKE_AUDIO_INPUT_STREAM_H_
 
+#include <memory>
 #include <vector>
 
 #include "base/callback_forward.h"
 #include "base/macros.h"
-#include "base/memory/scoped_ptr.h"
 #include "media/audio/audio_io.h"
 #include "media/audio/audio_parameters.h"
 #include "media/audio/fake_audio_worker.h"
@@ -60,7 +60,7 @@ class MEDIA_EXPORT FakeAudioInputStream
                        const AudioParameters& params);
   ~FakeAudioInputStream() override;
 
-  scoped_ptr<AudioOutputStream::AudioSourceCallback> ChooseSource();
+  std::unique_ptr<AudioOutputStream::AudioSourceCallback> ChooseSource();
   void ReadAudioFromSource();
 
   AudioManagerBase* audio_manager_;
@@ -68,8 +68,8 @@ class MEDIA_EXPORT FakeAudioInputStream
   FakeAudioWorker fake_audio_worker_;
   AudioParameters params_;
 
-  scoped_ptr<AudioOutputStream::AudioSourceCallback> audio_source_;
-  scoped_ptr<media::AudioBus> audio_bus_;
+  std::unique_ptr<AudioOutputStream::AudioSourceCallback> audio_source_;
+  std::unique_ptr<media::AudioBus> audio_bus_;
 
   DISALLOW_COPY_AND_ASSIGN(FakeAudioInputStream);
 };