Migrate WaitableEvent to enum-based constructor in storage/

storage/common/database/database_connections.cc

Index: storage/common/database/database_connections.cc
diff --git a/storage/common/database/database_connections.cc b/storage/common/database/database_connections.cc
index f6931d3942b71d599b2780bf07f513f2afd85b0c..bbc7afcbd74dc49be034758f4cfb096de5adfe25 100644
--- a/storage/common/database/database_connections.cc
+++ b/storage/common/database/database_connections.cc
@@ -153,7 +153,9 @@ void DatabaseConnectionsWrapper::RemoveOpenConnection(
 
 bool DatabaseConnectionsWrapper::WaitForAllDatabasesToClose(
     base::TimeDelta timeout) {
-  base::WaitableEvent waitable_event(true, false);
+  base::WaitableEvent waitable_event(
+      base::WaitableEvent::ResetPolicy::MANUAL,
+      base::WaitableEvent::InitialState::NOT_SIGNALED);
   {
     base::AutoLock auto_lock(open_connections_lock_);
     if (open_connections_.IsEmpty())