Revert of Rename thread annotation macros to have RTC prefix for syncrhonization primitives.

webrtc/rtc_base/task_queue.h

 /*
  *  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 135 matching lines @@
 //
 // For more examples, see task_queue_unittests.cc.
 //
 // A note on destruction:
 //
 // When a TaskQueue is deleted, pending tasks will not be executed but they will
 // be deleted.  The deletion of tasks may happen asynchronously after the
 // TaskQueue itself has been deleted or it may happen synchronously while the
 // TaskQueue instance is being deleted.  This may vary from one OS to the next
 // so assumptions about lifetimes of pending tasks should not be made.
-class RTC_LOCKABLE TaskQueue {
+class LOCKABLE TaskQueue {
  public:
   // TaskQueue priority levels. On some platforms these will map to thread
   // priorities, on others such as Mac and iOS, GCD queue priorities.
   enum class Priority {
     NORMAL = 0,
     HIGH,
     LOW,
   };
 
   explicit TaskQueue(const char* queue_name,
@@ skipping 104 matching lines @@
   class Impl;
   const scoped_refptr<Impl> impl_;
 #endif
 
   RTC_DISALLOW_COPY_AND_ASSIGN(TaskQueue);
 };
 
 }  // namespace rtc
 
 #endif  // WEBRTC_RTC_BASE_TASK_QUEUE_H_