Update thread annotiation macros in modules to use RTC_ prefix

webrtc/modules/rtp_rtcp/source/playout_delay_oracle.h

 /*
  *  Copyright (c) 2016 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 45 matching lines @@
                      uint16_t seq_num);
 
   void OnReceivedRtcpReportBlocks(const ReportBlockList& report_blocks);
 
  private:
   // The playout delay information is updated from the encoder thread(s).
   // The sequence number feedback is updated from the worker thread.
   // Guards access to data across multiple threads.
   rtc::CriticalSection crit_sect_;
   // The current highest sequence number on which playout delay has been sent.
-  int64_t high_sequence_number_ GUARDED_BY(crit_sect_);
+  int64_t high_sequence_number_ RTC_GUARDED_BY(crit_sect_);
   // Indicates whether the playout delay should go on the next frame.
-  bool send_playout_delay_ GUARDED_BY(crit_sect_);
+  bool send_playout_delay_ RTC_GUARDED_BY(crit_sect_);
   // Sender ssrc.
-  uint32_t ssrc_ GUARDED_BY(crit_sect_);
+  uint32_t ssrc_ RTC_GUARDED_BY(crit_sect_);
   // Sequence number unwrapper.
-  SequenceNumberUnwrapper unwrapper_ GUARDED_BY(crit_sect_);
+  SequenceNumberUnwrapper unwrapper_ RTC_GUARDED_BY(crit_sect_);
   // Playout delay values on the next frame if |send_playout_delay_| is set.
-  PlayoutDelay playout_delay_ GUARDED_BY(crit_sect_);
+  PlayoutDelay playout_delay_ RTC_GUARDED_BY(crit_sect_);
 
   RTC_DISALLOW_COPY_AND_ASSIGN(PlayoutDelayOracle);
 };
 
 }  // namespace webrtc
 
 #endif  // WEBRTC_MODULES_RTP_RTCP_SOURCE_PLAYOUT_DELAY_ORACLE_H_