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

webrtc/rtc_base/thread_checker.h

Index: webrtc/rtc_base/thread_checker.h
diff --git a/webrtc/rtc_base/thread_checker.h b/webrtc/rtc_base/thread_checker.h
index b6ce017538e1f7aa2148d72faf71e083eccef9ba..824ebe5a7fc012b209a001534e0758904e7c75a9 100644
--- a/webrtc/rtc_base/thread_checker.h
+++ b/webrtc/rtc_base/thread_checker.h
@@ -71,22 +71,20 @@ class ThreadCheckerDoNothing {
 //
 // In Release mode, CalledOnValidThread will always return true.
 #if ENABLE_THREAD_CHECKER
-class LOCKABLE ThreadChecker : public ThreadCheckerImpl {
-};
+class RTC_LOCKABLE ThreadChecker : public ThreadCheckerImpl {};
 #else
-class LOCKABLE ThreadChecker : public ThreadCheckerDoNothing {
-};
+class RTC_LOCKABLE ThreadChecker : public ThreadCheckerDoNothing {};
 #endif  // ENABLE_THREAD_CHECKER
 
 #undef ENABLE_THREAD_CHECKER
 
 namespace internal {
-class SCOPED_LOCKABLE AnnounceOnThread {
+class RTC_SCOPED_LOCKABLE AnnounceOnThread {
  public:
-  template<typename ThreadLikeObject>
+  template <typename ThreadLikeObject>
   explicit AnnounceOnThread(const ThreadLikeObject* thread_like_object)
-      EXCLUSIVE_LOCK_FUNCTION(thread_like_object) {}
-  ~AnnounceOnThread() UNLOCK_FUNCTION() {}
+      RTC_EXCLUSIVE_LOCK_FUNCTION(thread_like_object) {}
+  ~AnnounceOnThread() RTC_UNLOCK_FUNCTION() {}
 
   template<typename ThreadLikeObject>
   static bool IsCurrent(const ThreadLikeObject* thread_like_object) {
@@ -166,10 +164,10 @@ class SCOPED_LOCKABLE AnnounceOnThread {
 
 // 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))
+#define ACCESS_ON(x) RTC_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 RUN_ON(x) RTC_THREAD_ANNOTATION_ATTRIBUTE__(exclusive_locks_required(x))
 
 #define RTC_DCHECK_RUN_ON(thread_like_object) \
   rtc::internal::AnnounceOnThread thread_announcer(thread_like_object); \