Add RTC_ prefix to contructormagic macros.

webrtc/modules/rtp_rtcp/source/rtp_format_vp8_test_helper.h

 /*
  *  Copyright (c) 2011 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 47 matching lines @@
   uint8_t* buffer_;
   uint8_t* data_ptr_;
   RTPFragmentationHeader* fragmentation_;
   const RTPVideoHeaderVP8* hdr_info_;
   int payload_start_;
   size_t payload_size_;
   size_t buffer_size_;
   bool sloppy_partitioning_;
   bool inited_;
 
-  DISALLOW_COPY_AND_ASSIGN(RtpFormatVp8TestHelper);
+  RTC_DISALLOW_COPY_AND_ASSIGN(RtpFormatVp8TestHelper);
 };
 
 }  // namespace test
 
 }  // namespace webrtc
 
 #endif  // WEBRTC_MODULES_RTP_RTCP_SOURCE_RTP_FORMAT_VP8_TEST_HELPER_H_