Add RTC_ prefix to contructormagic macros.

webrtc/modules/desktop_capture/x11/x_error_trap.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 13 matching lines @@
   explicit XErrorTrap(Display* display);
   ~XErrorTrap();
 
   // Returns last error and removes unregisters the error handler.
   int GetLastErrorAndDisable();
 
  private:
   XErrorHandler original_error_handler_;
   bool enabled_;
 
-  DISALLOW_COPY_AND_ASSIGN(XErrorTrap);
+  RTC_DISALLOW_COPY_AND_ASSIGN(XErrorTrap);
 };
 
 }  // namespace webrtc
 
 #endif  // WEBRTC_MODULES_DESKTOP_CAPTURE_X11_X_ERROR_TRAP_H_