Migrate WaitableEvent to enum-based constructor in ipc/

ipc/ipc_sync_message.cc

Index: ipc/ipc_sync_message.cc
diff --git a/ipc/ipc_sync_message.cc b/ipc/ipc_sync_message.cc
index 884dd8029d5b32cdc3149917afe6aa40c5d1d2ca..7f9df7bd9bc0187ace28d3595381c431e00b635b 100644
--- a/ipc/ipc_sync_message.cc
+++ b/ipc/ipc_sync_message.cc
@@ -20,7 +20,9 @@ struct WaitableEventLazyInstanceTraits
     : public base::DefaultLazyInstanceTraits<base::WaitableEvent> {
   static base::WaitableEvent* New(void* instance) {
     // Use placement new to initialize our instance in our preallocated space.
-    return new (instance) base::WaitableEvent(true, true);
+    return new (instance)
+        base::WaitableEvent(base::WaitableEvent::ResetPolicy::MANUAL,
+                            base::WaitableEvent::InitialState::SIGNALED);
   }
 };