Update thread annotiation macros to use RTC_ prefix

webrtc/media/base/videocapturer.h

 /*
  *  Copyright (c) 2010 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 253 matching lines @@
   bool enable_camera_list_;
   int scaled_width_;  // Current output size from ComputeScale.
   int scaled_height_;
 
   rtc::VideoBroadcaster broadcaster_;
   bool enable_video_adapter_;
   VideoAdapter video_adapter_;
 
   rtc::CriticalSection frame_stats_crit_;
   // The captured frame size before potential adapation.
-  bool input_size_valid_ GUARDED_BY(frame_stats_crit_) = false;
-  int input_width_ GUARDED_BY(frame_stats_crit_);
-  int input_height_ GUARDED_BY(frame_stats_crit_);
+  bool input_size_valid_ RTC_GUARDED_BY(frame_stats_crit_) = false;
+  int input_width_ RTC_GUARDED_BY(frame_stats_crit_);
+  int input_height_ RTC_GUARDED_BY(frame_stats_crit_);
 
   // Whether capturer should apply rotation to the frame before
   // passing it on to the registered sinks.
   bool apply_rotation_;
 
   // State for the timestamp translation.
   rtc::TimestampAligner timestamp_aligner_;
   RTC_DISALLOW_COPY_AND_ASSIGN(VideoCapturer);
 };
 
 }  // namespace cricket
 
 #endif  // WEBRTC_MEDIA_BASE_VIDEOCAPTURER_H_