Remove unused Isolate* parameters from toV8Context()

Source/web/WebLocalFrameImpl.cpp

 /*
  * Copyright (C) 2009 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 820 matching lines @@
 }
 
 v8::Handle<v8::Value> WebLocalFrameImpl::callFunctionEvenIfScriptDisabled(v8::Handle<v8::Function> function, v8::Handle<v8::Value> receiver, int argc, v8::Handle<v8::Value> argv[])
 {
     ASSERT(frame());
     return frame()->script().callFunction(function, receiver, argc, argv);
 }
 
 v8::Local<v8::Context> WebLocalFrameImpl::mainWorldScriptContext() const
 {
-    return toV8Context(V8PerIsolateData::mainThreadIsolate(), frame(), DOMWrapperWorld::mainWorld());
+    return toV8Context(frame(), DOMWrapperWorld::mainWorld());
 }
 
 void WebLocalFrameImpl::reload(bool ignoreCache)
 {
     ASSERT(frame());
     frame()->loader().reload(ignoreCache ? EndToEndReload : NormalReload);
 }
 
 void WebLocalFrameImpl::reloadWithOverrideURL(const WebURL& overrideUrl, bool ignoreCache)
 {
@@ skipping 1060 matching lines @@
 
 void WebLocalFrameImpl::invalidateAll() const
 {
     ASSERT(frame() && frame()->view());
     FrameView* view = frame()->view();
     view->invalidateRect(view->frameRect());
     invalidateScrollbar();
 }
 
 } // namespace blink