Update thread annotiation macros in modules to use RTC_ prefix

webrtc/modules/video_coding/codecs/test/video_codec_test.h

 /*
  *  Copyright (c) 2017 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 77 matching lines @@
   std::unique_ptr<VideoDecoder> decoder_;
 
  private:
   void InitCodecs();
 
   FakeEncodeCompleteCallback encode_complete_callback_;
   FakeDecodeCompleteCallback decode_complete_callback_;
 
   rtc::Event encoded_frame_event_;
   rtc::CriticalSection encoded_frame_section_;
-  rtc::Optional<EncodedImage> encoded_frame_ GUARDED_BY(encoded_frame_section_);
-  CodecSpecificInfo codec_specific_info_ GUARDED_BY(encoded_frame_section_);
+  rtc::Optional<EncodedImage> encoded_frame_
+      RTC_GUARDED_BY(encoded_frame_section_);
+  CodecSpecificInfo codec_specific_info_ RTC_GUARDED_BY(encoded_frame_section_);
 
   rtc::Event decoded_frame_event_;
   rtc::CriticalSection decoded_frame_section_;
-  rtc::Optional<VideoFrame> decoded_frame_ GUARDED_BY(decoded_frame_section_);
-  rtc::Optional<uint8_t> decoded_qp_ GUARDED_BY(decoded_frame_section_);
+  rtc::Optional<VideoFrame> decoded_frame_
+      RTC_GUARDED_BY(decoded_frame_section_);
+  rtc::Optional<uint8_t> decoded_qp_ RTC_GUARDED_BY(decoded_frame_section_);
 };
 
 }  // namespace webrtc
 
 #endif  // WEBRTC_MODULES_VIDEO_CODING_CODECS_TEST_VIDEO_CODEC_TEST_H_