Move MainWorldScriptContext accessor/method from WebFrame to WebLocalFrame.

third_party/WebKit/Source/web/WebLocalFrameImpl.h

 /*
  * 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 128 matching lines @@
       unsigned num_sources,
       bool user_gesture,
       ScriptExecutionType,
       WebScriptExecutionCallback*) override;
   v8::Local<v8::Value> CallFunctionEvenIfScriptDisabled(
       v8::Local<v8::Function>,
       v8::Local<v8::Value>,
       int argc,
       v8::Local<v8::Value> argv[]) override;
   v8::Local<v8::Context> MainWorldScriptContext() const override;
+  v8::Local<v8::Object> GlobalProxy() const override;
   void Reload(WebFrameLoadType) override;
   void ReloadWithOverrideURL(const WebURL& override_url,
                              WebFrameLoadType) override;
   void ReloadImage(const WebNode&) override;
   void ReloadLoFiImages() override;
   void LoadRequest(const WebURLRequest&) override;
   void LoadHTMLString(const WebData& html,
                       const WebURL& base_url,
                       const WebURL& unreachable_url,
                       bool replace) override;
@@ skipping 365 matching lines @@
 
 DEFINE_TYPE_CASTS(WebLocalFrameImpl,
                   WebFrame,
                   frame,
                   frame->IsWebLocalFrame(),
                   frame.IsWebLocalFrame());
 
 }  // namespace blink
 
 #endif