Update thread annotiation macros to use RTC_ prefix

webrtc/rtc_tools/network_tester/packet_sender.h

Index: webrtc/rtc_tools/network_tester/packet_sender.h
diff --git a/webrtc/rtc_tools/network_tester/packet_sender.h b/webrtc/rtc_tools/network_tester/packet_sender.h
index d47543d08f0a36f0d9cd4670d9bc0f2320b1a39c..78c3ab8b80153e3d25929319d49425f6b8545d39 100644
--- a/webrtc/rtc_tools/network_tester/packet_sender.h
+++ b/webrtc/rtc_tools/network_tester/packet_sender.h
@@ -49,10 +49,10 @@ class PacketSender {
 
  private:
   rtc::SequencedTaskChecker worker_queue_checker_;
-  size_t packet_size_ ACCESS_ON(worker_queue_checker_);
-  int64_t send_interval_ms_ ACCESS_ON(worker_queue_checker_);
-  int64_t sequence_number_ ACCESS_ON(worker_queue_checker_);
-  bool sending_ ACCESS_ON(worker_queue_checker_);
+  size_t packet_size_ RTC_ACCESS_ON(worker_queue_checker_);
+  int64_t send_interval_ms_ RTC_ACCESS_ON(worker_queue_checker_);
+  int64_t sequence_number_ RTC_ACCESS_ON(worker_queue_checker_);
+  bool sending_ RTC_ACCESS_ON(worker_queue_checker_);
   const std::string config_file_path_;
   TestController* const test_controller_;
   rtc::TaskQueue worker_queue_;