Cheaper thread-safe atomic initialization of static references.

Source/wtf/HashTable.cpp

Index: Source/wtf/HashTable.cpp
diff --git a/Source/wtf/HashTable.cpp b/Source/wtf/HashTable.cpp
index 518a4c8c24ae5cda1fb0c6769ef604bf193dd7c1..cf9d48d12ae06e00d2f02282c1a00bff9e1a8ad3 100644
--- a/Source/wtf/HashTable.cpp
+++ b/Source/wtf/HashTable.cpp
@@ -35,7 +35,7 @@ int HashTableStats::numReinserts;
 
 static Mutex& hashTableStatsMutex()
 {
-    AtomicallyInitializedStatic(Mutex&, mutex = *new Mutex);
+    AtomicallyInitializedStaticReference(Mutex, mutex, new Mutex);
     return mutex;
 }