Update thread annotiation macros in modules to use RTC_ prefix

webrtc/modules/congestion_controller/transport_feedback_adapter.h

Index: webrtc/modules/congestion_controller/transport_feedback_adapter.h
diff --git a/webrtc/modules/congestion_controller/transport_feedback_adapter.h b/webrtc/modules/congestion_controller/transport_feedback_adapter.h
index 4fe70c5dcc37043075566af3c5363555a7ffd9dd..4d4b4077ceb128587943e86aec8243d786e5d227 100644
--- a/webrtc/modules/congestion_controller/transport_feedback_adapter.h
+++ b/webrtc/modules/congestion_controller/transport_feedback_adapter.h
@@ -61,19 +61,20 @@ class TransportFeedbackAdapter {
 
   const bool send_side_bwe_with_overhead_;
   rtc::CriticalSection lock_;
-  int transport_overhead_bytes_per_packet_ GUARDED_BY(&lock_);
-  SendTimeHistory send_time_history_ GUARDED_BY(&lock_);
+  int transport_overhead_bytes_per_packet_ RTC_GUARDED_BY(&lock_);
+  SendTimeHistory send_time_history_ RTC_GUARDED_BY(&lock_);
   const Clock* const clock_;
   int64_t current_offset_ms_;
   int64_t last_timestamp_us_;
   std::vector<PacketFeedback> last_packet_feedback_vector_;
-  uint16_t local_net_id_ GUARDED_BY(&lock_);
-  uint16_t remote_net_id_ GUARDED_BY(&lock_);
-  std::deque<int64_t> feedback_rtts_ GUARDED_BY(&lock_);
-  rtc::Optional<int64_t> min_feedback_rtt_ GUARDED_BY(&lock_);
+  uint16_t local_net_id_ RTC_GUARDED_BY(&lock_);
+  uint16_t remote_net_id_ RTC_GUARDED_BY(&lock_);
+  std::deque<int64_t> feedback_rtts_ RTC_GUARDED_BY(&lock_);
+  rtc::Optional<int64_t> min_feedback_rtt_ RTC_GUARDED_BY(&lock_);
 
   rtc::CriticalSection observers_lock_;
-  std::vector<PacketFeedbackObserver*> observers_ GUARDED_BY(&observers_lock_);
+  std::vector<PacketFeedbackObserver*> observers_
+      RTC_GUARDED_BY(&observers_lock_);
 };
 
 }  // namespace webrtc