Moves macros ACCESS_ON/RUN_ON from thread_annotations to thread_checker

webrtc/base/thread_checker.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.
  */
 
@@ skipping 155 matching lines @@
 //     // encoder_->Encode();
 //     // Will work:
 //     rtc::scoped_ref_ptr<Encoder> encoder = encoder_;
 //     encoder_->Queue()->PostTask([encoder] { encoder->Encode(); });
 //   }
 //
 //  private:
 //   rtc::scoped_ref_ptr<Encoder> encoder_;
 // }
 
+// Document if a variable/field is not shared and should be accessed from
+// same thread/task queue.
+#define ACCESS_ON(x) THREAD_ANNOTATION_ATTRIBUTE__(guarded_by(x))
+
+// Document if a function expected to be called from same thread/task queue.
+#define RUN_ON(x) THREAD_ANNOTATION_ATTRIBUTE__(exclusive_locks_required(x))
+
 #define RTC_DCHECK_RUN_ON(thread_like_object) \
   rtc::internal::AnnounceOnThread thread_announcer(thread_like_object); \
   RTC_DCHECK(rtc::internal::AnnounceOnThread::IsCurrent(thread_like_object))
 
 #endif  // WEBRTC_BASE_THREAD_CHECKER_H_