Update thread annotiation macros to use RTC_ prefix

webrtc/voice_engine/test/auto_test/fixtures/after_initialization_fixture.h

 /*
  *  Copyright (c) 2011 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 127 matching lines @@
           break;
       }
       ++transmitted_packets_;
     }
     return true;
   }
 
   rtc::CriticalSection crit_;
   const std::unique_ptr<webrtc::EventWrapper> packet_event_;
   rtc::PlatformThread thread_;
-  std::deque<Packet> packet_queue_ GUARDED_BY(crit_);
+  std::deque<Packet> packet_queue_ RTC_GUARDED_BY(crit_);
   const int channel_;
-  std::map<uint32_t, int> channels_ GUARDED_BY(crit_);
+  std::map<uint32_t, int> channels_ RTC_GUARDED_BY(crit_);
   webrtc::VoENetwork* const voe_network_;
   webrtc::Atomic32 transmitted_packets_;
 };
 
 // This fixture initializes the voice engine in addition to the work
 // done by the before-initialization fixture. It also registers an error
 // observer which will fail tests on error callbacks. This fixture is
 // useful to tests that want to run before we have started any form of
 // streaming through the voice engine.
 class AfterInitializationFixture : public BeforeInitializationFixture {
  public:
   AfterInitializationFixture();
   virtual ~AfterInitializationFixture();
 
  protected:
   std::unique_ptr<TestErrorObserver> error_observer_;
 };
 
 #endif  // SRC_VOICE_ENGINE_MAIN_TEST_AUTO_TEST_STANDARD_TEST_BASE_AFTER_INIT_H_