Replace scoped_ptr with unique_ptr in webrtc/common_audio/

webrtc/common_audio/audio_ring_buffer.h

 /*
  *  Copyright (c) 2015 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 #ifndef WEBRTC_COMMON_AUDIO_AUDIO_RING_BUFFER_H_
@@ skipping 29 matching lines @@
 
   // Moves the read position. The forward version advances the read pointer
   // towards the write pointer and the backward verison withdraws the read
   // pointer away from the write pointer (i.e. flushing and stuffing the buffer
   // respectively.)
   void MoveReadPositionForward(size_t frames);
   void MoveReadPositionBackward(size_t frames);
 
  private:
   // We don't use a ScopedVector because it doesn't support a specialized
-  // deleter (like scoped_ptr for instance.)
+  // deleter (like unique_ptr for instance.)
   std::vector<RingBuffer*> buffers_;
 };
 
 }  // namespace webrtc
 
 #endif  // WEBRTC_COMMON_AUDIO_AUDIO_RING_BUFFER_H_