Add RTC_ prefix to (D)CHECKs and related macros.

webrtc/base/thread_checker_impl.h

 /*
  *  Copyright (c) 2014 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.
  */
 
 // Borrowed from Chromium's src/base/threading/thread_checker_impl.h.
 
 #ifndef WEBRTC_BASE_THREAD_CHECKER_IMPL_H_
 #define WEBRTC_BASE_THREAD_CHECKER_IMPL_H_
 
 #include "webrtc/base/criticalsection.h"
 #include "webrtc/base/platform_thread.h"
 
 namespace rtc {
 
 // Real implementation of ThreadChecker, for use in debug mode, or
-// for temporary use in release mode (e.g. to CHECK on a threading issue
+// for temporary use in release mode (e.g. to RTC_CHECK on a threading issue
 // seen only in the wild).
 //
 // Note: You should almost always use the ThreadChecker class to get the
 // right version for your build configuration.
 class ThreadCheckerImpl {
  public:
   ThreadCheckerImpl();
   ~ThreadCheckerImpl();
 
   bool CalledOnValidThread() const;
 
   // Changes the thread that is checked for in CalledOnValidThread.  This may
   // be useful when an object may be created on one thread and then used
   // exclusively on another thread.
   void DetachFromThread();
 
  private:
   mutable CriticalSection lock_;
   // This is mutable so that CalledOnValidThread can set it.
   // It's guarded by |lock_|.
   mutable PlatformThreadRef valid_thread_;
 };
 
 }  // namespace rtc
 
 #endif  // WEBRTC_BASE_THREAD_CHECKER_IMPL_H_