Add RTC_ prefix to contructormagic macros.

webrtc/modules/desktop_capture/shared_memory.h

 /*
  *  Copyright (c) 2013 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 41 matching lines @@
 
  protected:
   SharedMemory(void* data, size_t size, Handle handle, int id);
 
   void* const data_;
   const size_t size_;
   const Handle handle_;
   const int id_;
 
  private:
-  DISALLOW_COPY_AND_ASSIGN(SharedMemory);
+  RTC_DISALLOW_COPY_AND_ASSIGN(SharedMemory);
 };
 
 }  // namespace webrtc
 
 #endif  // WEBRTC_MODULES_DESKTOP_CAPTURE_SHARED_MEMORY_H_