binding: Removes createClosure().

third_party/WebKit/Source/bindings/core/v8/ScriptFunction.h

 /*
  * Copyright (C) 2013 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 35 matching lines @@
 //     // garbage-collected.
 //     static v8::Local<v8::Function> createFunction(ScriptState* scriptState)
 //     {
 //         DerivedFunction* self = new DerivedFunction(scriptState);
 //         return self->bindToV8Function();
 //     }
 // };
 class CORE_EXPORT ScriptFunction : public GarbageCollectedFinalized<ScriptFunction> {
 public:
     virtual ~ScriptFunction() { }
-    ScriptState* getScriptState() const { return m_scriptState.get(); }
     DEFINE_INLINE_VIRTUAL_TRACE() { }
 
 protected:
     explicit ScriptFunction(ScriptState* scriptState)
         : m_scriptState(scriptState)
+#if ENABLE(ASSERT)
+        , m_bindToV8FunctionAlreadyCalled(false)
+#endif
     {
     }
 
+    ScriptState* getScriptState() const { return m_scriptState.get(); }
+
     v8::Local<v8::Function> bindToV8Function();
 
 private:
     virtual ScriptValue call(ScriptValue) = 0;
     static void callCallback(const v8::FunctionCallbackInfo<v8::Value>&);
 
     RefPtr<ScriptState> m_scriptState;
+#if ENABLE(ASSERT)
+    // bindToV8Function must not be called twice.
+    bool m_bindToV8FunctionAlreadyCalled;
+#endif
 };
 
 } // namespace blink
 
 #endif