Add RTC_ prefix to contructormagic macros.

webrtc/modules/desktop_capture/screen_capturer_helper.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 62 matching lines @@
   rtc::scoped_ptr<RWLockWrapper> invalid_region_lock_;
 
   // The size of the most recently captured screen.
   DesktopSize size_most_recent_;
 
   // The log (base 2) of the size of the grid to which the invalid region is
   // expanded.
   // If the value is <= 0, then the invalid region is not expanded to a grid.
   int log_grid_size_;
 
-  DISALLOW_COPY_AND_ASSIGN(ScreenCapturerHelper);
+  RTC_DISALLOW_COPY_AND_ASSIGN(ScreenCapturerHelper);
 };
 
 }  // namespace webrtc
 
 #endif  // WEBRTC_MODULES_DESKTOP_CAPTURE_SCREEN_CAPTURER_HELPER_H_