Decrease call sites of ScriptState::current()

Source/bindings/v8/V8MutationCallback.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:
  * 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
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 22 matching lines @@
 #include "wtf/OwnPtr.h"
 #include "wtf/RefPtr.h"
 #include <v8.h>
 
 namespace WebCore {
 
 class ExecutionContext;
 
 class V8MutationCallback FINAL : public MutationCallback, public ActiveDOMCallback {
 public:
-    static PassOwnPtr<V8MutationCallback> create(v8::Handle<v8::Function> callback, ExecutionContext* context, v8::Handle<v8::Object> owner, v8::Isolate* isolate)
+    static PassOwnPtr<V8MutationCallback> create(v8::Handle<v8::Function> callback, v8::Handle<v8::Object> owner, ScriptState* scriptState)
     {
-        ASSERT(context);
-        return adoptPtr(new V8MutationCallback(callback, context, owner, isolate));
+        return adoptPtr(new V8MutationCallback(callback, owner, scriptState));
     }
 
     virtual void call(const WillBeHeapVector<RefPtrWillBeMember<MutationRecord> >&, MutationObserver*) OVERRIDE;
     virtual ExecutionContext* executionContext() const OVERRIDE { return ContextLifecycleObserver::executionContext(); }
 
 private:
-    V8MutationCallback(v8::Handle<v8::Function>, ExecutionContext*, v8::Handle<v8::Object>, v8::Isolate*);
+    V8MutationCallback(v8::Handle<v8::Function>, v8::Handle<v8::Object>, ScriptState*);
 
     static void setWeakCallback(const v8::WeakCallbackData<v8::Function, V8MutationCallback>&);
 
     ScopedPersistent<v8::Function> m_callback;
     RefPtr<ScriptState> m_scriptState;
 };
 
 }
 
 #endif // V8MutationCallback_h