Update thread annotiation macros to use RTC_ prefix

webrtc/rtc_base/task_queue_win.cc

 /*
  *  Copyright 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 218 matching lines @@
                         std::vector<DelayedTaskInfo>,
                         greater<DelayedTaskInfo>>
         timer_tasks_;
     UINT_PTR timer_id_ = 0;
     HANDLE in_queue_;
   };
 
   TaskQueue* const queue_;
   WorkerThread thread_;
   rtc::CriticalSection pending_lock_;
-  std::queue<std::unique_ptr<QueuedTask>> pending_ GUARDED_BY(pending_lock_);
+  std::queue<std::unique_ptr<QueuedTask>> pending_
+      RTC_GUARDED_BY(pending_lock_);
   HANDLE in_queue_;
 };
 
 TaskQueue::Impl::Impl(const char* queue_name,
                       TaskQueue* queue,
                       Priority priority)
     : queue_(queue),
       thread_(&TaskQueue::Impl::ThreadMain,
               this,
               queue_name,
@@ skipping 247 matching lines @@
   return TaskQueue::impl_->PostTaskAndReply(std::move(task), std::move(reply),
                                             impl_.get());
 }
 
 void TaskQueue::PostDelayedTask(std::unique_ptr<QueuedTask> task,
                                 uint32_t milliseconds) {
   return TaskQueue::impl_->PostDelayedTask(std::move(task), milliseconds);
 }
 
 }  // namespace rtc