Move MainWorldScriptContext accessor/method from WebFrame to WebLocalFrame.

third_party/WebKit/Source/core/exported/WebRemoteFrameImpl.h

 // 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.
 
 #ifndef WebRemoteFrameImpl_h
 #define WebRemoteFrameImpl_h
 
 #include "core/CoreExport.h"
 #include "core/frame/RemoteFrame.h"
 #include "core/frame/WebRemoteFrameBase.h"
@@ skipping 47 matching lines @@
   void ExecuteScriptInIsolatedWorld(
       int world_id,
       const WebScriptSource* sources_in,
       unsigned num_sources,
       WebVector<v8::Local<v8::Value>>* results) 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;
   void Reload(WebFrameLoadType) override;
   void ReloadWithOverrideURL(const WebURL& override_url,
                              WebFrameLoadType) override;
   void LoadRequest(const WebURLRequest&) override;
   void StopLoading() override;
   void EnableViewSourceMode(bool enable) override;
   bool IsViewSourceModeEnabled() const override;
   void SetReferrerForRequest(WebURLRequest&, const WebURL& referrer) override;
   WebAssociatedURLLoader* CreateAssociatedURLLoader(
       const WebAssociatedURLLoaderOptions&) override;
@@ skipping 81 matching lines @@
 
 DEFINE_TYPE_CASTS(WebRemoteFrameImpl,
                   WebFrame,
                   frame,
                   frame->IsWebRemoteFrame(),
                   frame.IsWebRemoteFrame());
 
 }  // namespace blink
 
 #endif  // WebRemoteFrameImpl_h