Add RTC_ prefix to contructormagic macros.

webrtc/modules/rtp_rtcp/source/rtp_format_vp9.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 73 matching lines @@
   bool WriteHeader(const PacketInfo& packet_info,
                    uint8_t* buffer,
                    size_t* header_length) const;
 
   const RTPVideoHeaderVP9 hdr_;
   const size_t max_payload_length_;  // The max length in bytes of one packet.
   const uint8_t* payload_;           // The payload data to be packetized.
   size_t payload_size_;              // The size in bytes of the payload data.
   PacketInfoQueue packets_;
 
-  DISALLOW_COPY_AND_ASSIGN(RtpPacketizerVp9);
+  RTC_DISALLOW_COPY_AND_ASSIGN(RtpPacketizerVp9);
 };
 
 
 class RtpDepacketizerVp9 : public RtpDepacketizer {
  public:
   virtual ~RtpDepacketizerVp9() {}
 
   bool Parse(ParsedPayload* parsed_payload,
              const uint8_t* payload,
              size_t payload_length) override;
 };
 
 }  // namespace webrtc
 #endif  // WEBRTC_MODULES_RTP_RTCP_SOURCE_RTP_FORMAT_VP9_H_