Add RTC_ prefix to contructormagic macros.

webrtc/common_audio/audio_converter.h

 /*
  *  Copyright (c) 2014 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.
  */
 
@@ skipping 40 matching lines @@
 
   // Helper to CHECK that inputs are correctly sized.
   void CheckSizes(size_t src_size, size_t dst_capacity) const;
 
  private:
   const int src_channels_;
   const size_t src_frames_;
   const int dst_channels_;
   const size_t dst_frames_;
 
-  DISALLOW_COPY_AND_ASSIGN(AudioConverter);
+  RTC_DISALLOW_COPY_AND_ASSIGN(AudioConverter);
 };
 
 }  // namespace webrtc
 
 #endif  // WEBRTC_COMMON_AUDIO_AUDIO_CONVERTER_H_