Update thread annotiation macros to use RTC_ prefix

webrtc/video/rtp_streams_synchronizer.h

 /*
  *  Copyright (c) 2012 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 34 matching lines @@
   // conversion.
   bool GetStreamSyncOffsetInMs(uint32_t timestamp,
                                int64_t render_time_ms,
                                int64_t* stream_offset_ms,
                                double* estimated_freq_khz) const;
 
  private:
   Syncable* syncable_video_;
 
   rtc::CriticalSection crit_;
-  Syncable* syncable_audio_ GUARDED_BY(crit_);
-  std::unique_ptr<StreamSynchronization> sync_ GUARDED_BY(crit_);
-  StreamSynchronization::Measurements audio_measurement_ GUARDED_BY(crit_);
-  StreamSynchronization::Measurements video_measurement_ GUARDED_BY(crit_);
+  Syncable* syncable_audio_ RTC_GUARDED_BY(crit_);
+  std::unique_ptr<StreamSynchronization> sync_ RTC_GUARDED_BY(crit_);
+  StreamSynchronization::Measurements audio_measurement_ RTC_GUARDED_BY(crit_);
+  StreamSynchronization::Measurements video_measurement_ RTC_GUARDED_BY(crit_);
 
   rtc::ThreadChecker process_thread_checker_;
-  int64_t last_sync_time_ ACCESS_ON(&process_thread_checker_);
+  int64_t last_sync_time_ RTC_ACCESS_ON(&process_thread_checker_);
 };
 
 }  // namespace webrtc
 
 #endif  // WEBRTC_VIDEO_RTP_STREAMS_SYNCHRONIZER_H_