Cheaper thread-safe atomic initialization of static references.

Source/bindings/core/v8/Dictionary.cpp

 /*
  * Copyright (C) 2010 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:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 30 matching lines @@
 #include "bindings/core/v8/V8TextTrack.h"
 #include "bindings/core/v8/V8VoidCallback.h"
 #include "bindings/core/v8/V8Window.h"
 #include "core/html/track/TrackBase.h"
 #include "wtf/MathExtras.h"
 
 namespace blink {
 
 static ExceptionState& emptyExceptionState()
 {
-    AtomicallyInitializedStatic(WTF::ThreadSpecific<NonThrowableExceptionState>*, exceptionState = new ThreadSpecific<NonThrowableExceptionState>);
-    return **exceptionState;
+    AtomicallyInitializedStaticReference(WTF::ThreadSpecific<NonThrowableExceptionState>, exceptionState, new ThreadSpecific<NonThrowableExceptionState>);
+    return *exceptionState;
 }
 
 Dictionary::Dictionary()
     : m_isolate(0)
     , m_exceptionState(&emptyExceptionState())
 {
 }
 
 Dictionary::Dictionary(const v8::Handle<v8::Value>& options, v8::Isolate* isolate, ExceptionState& exceptionState)
     : m_options(options)
@@ skipping 216 matching lines @@
 
     return *this;
 }
 
 void Dictionary::ConversionContext::throwTypeError(const String& detail)
 {
     exceptionState().throwTypeError(detail);
 }
 
 } // namespace blink