Add RTC_ prefix to contructormagic macros.

webrtc/modules/audio_coding/codecs/opus/interface/audio_decoder_opus.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.
  */
 
@@ skipping 25 matching lines @@
                      SpeechType* speech_type) override;
   int DecodeRedundantInternal(const uint8_t* encoded,
                               size_t encoded_len,
                               int sample_rate_hz,
                               int16_t* decoded,
                               SpeechType* speech_type) override;
 
  private:
   OpusDecInst* dec_state_;
   const size_t channels_;
-  DISALLOW_COPY_AND_ASSIGN(AudioDecoderOpus);
+  RTC_DISALLOW_COPY_AND_ASSIGN(AudioDecoderOpus);
 };
 
 }  // namespace webrtc
 
 #endif  // WEBRTC_MODULES_AUDIO_CODING_CODECS_OPUS_INTERFACE_AUDIO_DECODER_OPUS_H