Migrate WaitableEvent to enum-based constructor in content/

content/renderer/media/rtc_peer_connection_handler.cc

Index: content/renderer/media/rtc_peer_connection_handler.cc
diff --git a/content/renderer/media/rtc_peer_connection_handler.cc b/content/renderer/media/rtc_peer_connection_handler.cc
index 2457cc1cf6135419a9b2fba01cfa05dd045ef492..c6c6d4cc784ba302f0df315bf7ff03c1156ca381 100644
--- a/content/renderer/media/rtc_peer_connection_handler.cc
+++ b/content/renderer/media/rtc_peer_connection_handler.cc
@@ -1762,7 +1762,8 @@ void RTCPeerConnectionHandler::RunSynchronousClosureOnSignalingThread(
     TRACE_EVENT0("webrtc", trace_event_name);
     closure.Run();
   } else {
-    base::WaitableEvent event(false, false);
+    base::WaitableEvent event(base::WaitableEvent::ResetPolicy::AUTOMATIC,
+                              base::WaitableEvent::InitialState::NOT_SIGNALED);
     thread->PostTask(FROM_HERE,
         base::Bind(&RunSynchronousClosure, closure,
                    base::Unretained(trace_event_name),