Cheaper thread-safe atomic initialization of static references.

Source/bindings/core/v8/ScriptProfiler.cpp

 /*
  * Copyright (c) 2011, Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 287 matching lines @@
 #if ENABLE(ASSERT)
         v8::Isolate* m_isolate;
 #endif
     } wrapperVisitor(visitor, isolate);
 
     v8::V8::VisitHandlesWithClassIds(isolate, &wrapperVisitor);
 }
 
 ProfileNameIdleTimeMap* ScriptProfiler::currentProfileNameIdleTimeMap()
 {
-    AtomicallyInitializedStatic(WTF::ThreadSpecific<ProfileNameIdleTimeMap>*, map = new WTF::ThreadSpecific<ProfileNameIdleTimeMap>);
-    return *map;
+    AtomicallyInitializedStaticReference(WTF::ThreadSpecific<ProfileNameIdleTimeMap>, map, new WTF::ThreadSpecific<ProfileNameIdleTimeMap>);
+    return map;
 }
 
 void ScriptProfiler::setIdle(bool isIdle)
 {
     v8::Isolate* isolate = v8::Isolate::GetCurrent();
     if (v8::CpuProfiler* profiler = isolate->GetCpuProfiler())
         profiler->SetIdle(isIdle);
 }
 
 } // namespace blink