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

media/base/audio_push_fifo.h

 // Copyright 2016 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_AUDIO_PUSH_FIFO_H_
 #define MEDIA_BASE_AUDIO_PUSH_FIFO_H_
 
+#include <memory>
+
 #include "base/callback.h"
 #include "base/macros.h"
-#include "base/memory/scoped_ptr.h"
 #include "media/base/audio_bus.h"
 #include "media/base/media_export.h"
 
 namespace media {
 
 // Yet another FIFO for audio data that re-buffers audio to a desired buffer
 // size.  Unlike AudioFifo and AudioBlockFifo, this FIFO cannot overflow: The
 // client is required to provide a callback that is called synchronously during
 // a push whenever enough data becomes available.  This implementation
 // eliminates redundant memory copies when the input buffer size always matches
@@ skipping 34 matching lines @@
   // frames plus padded zero samples.  If there are no frames currently
   // enqueued, OutputCallback is not run.
   void Flush();
 
  private:
   const OutputCallback callback_;
 
   int frames_per_buffer_;
 
   // Queue of frames pending for delivery.
-  scoped_ptr<AudioBus> audio_queue_;
+  std::unique_ptr<AudioBus> audio_queue_;
   int queued_frames_;
 
   DISALLOW_COPY_AND_ASSIGN(AudioPushFifo);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_BASE_AUDIO_PUSH_FIFO_H_