Manual refactor to enum-based WaitableEvent for remaining mac/ios files

components/cronet/ios/cronet_environment.cc

Index: components/cronet/ios/cronet_environment.cc
diff --git a/components/cronet/ios/cronet_environment.cc b/components/cronet/ios/cronet_environment.cc
index 8f6fd6779f98ebca666cb1576c4f16a704898819..96eacd2ddcd07060f72b81718ac44a1f4010f40c 100644
--- a/components/cronet/ios/cronet_environment.cc
+++ b/components/cronet/ios/cronet_environment.cc
@@ -169,7 +169,9 @@ void CronetEnvironment::StartNetLogOnNetworkThread(
 }
 
 void CronetEnvironment::StopNetLog() {
-  base::WaitableEvent log_stopped_event(true, false);
+  base::WaitableEvent log_stopped_event(
+      base::WaitableEvent::ResetPolicy::MANUAL,
+      base::WaitableEvent::InitialState::NOT_SIGNALED);
   PostToNetworkThread(FROM_HERE,
                       base::Bind(&CronetEnvironment::StopNetLogOnNetworkThread,
                                  base::Unretained(this), &log_stopped_event));