Remove unused Isolate* parameters from toV8Context()

Source/bindings/v8/ScriptState.cpp

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "config.h"
 #include "bindings/v8/ScriptState.h"
 
 #include "bindings/v8/V8Binding.h"
 #include "core/dom/ExecutionContext.h"
 #include "core/frame/LocalFrame.h"
@@ skipping 66 matching lines @@
 DOMWindow* ScriptState::domWindow() const
 {
     v8::HandleScope scope(m_isolate);
     return toDOMWindow(context());
 }
 
 ScriptState* ScriptState::forMainWorld(LocalFrame* frame)
 {
     v8::Isolate* isolate = toIsolate(frame);
     v8::HandleScope handleScope(isolate);
-    return ScriptState::from(toV8Context(isolate, frame, DOMWrapperWorld::mainWorld()));
+    return ScriptState::from(toV8Context(frame, DOMWrapperWorld::mainWorld()));
 }
 
 PassRefPtr<ScriptStateForTesting> ScriptStateForTesting::create(v8::Handle<v8::Context> context, PassRefPtr<DOMWrapperWorld> world)
 {
     RefPtr<ScriptStateForTesting> scriptState = adoptRef(new ScriptStateForTesting(context, world));
     // This ref() is for keeping this ScriptState alive as long as the v8::Context is alive.
     // This is deref()ed in the weak callback of the v8::Context.
     scriptState->ref();
     return scriptState;
 }
 
 ScriptStateForTesting::ScriptStateForTesting(v8::Handle<v8::Context> context, PassRefPtr<DOMWrapperWorld> world)
     : ScriptState(context, world)
 {
 }
 
 ExecutionContext* ScriptStateForTesting::executionContext() const
 {
     return m_executionContext.get();
 }
 
 void ScriptStateForTesting::setExecutionContext(PassRefPtr<ExecutionContext> executionContext)
 {
     m_executionContext = executionContext;
 }
 
 }