Expose the V8 script context from WebRemoteFrame.

Source/web/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/frame/FrameOwner.h"
 #include "platform/heap/Handle.h"
 #include "public/web/WebRemoteFrame.h"
@@ skipping 56 matching lines @@
         const WebScriptSource&) override;
     void executeScriptInIsolatedWorld(
         int worldID, const WebScriptSource* sourcesIn, unsigned numSources,
         int extensionGroup, 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;
+    v8::Local<v8::Context> deprecatedMainWorldScriptContext() const override;
     void reload(bool ignoreCache) override;
     void reloadWithOverrideURL(const WebURL& overrideUrl, bool ignoreCache) override;
     void loadRequest(const WebURLRequest&) override;
     void loadHistoryItem(const WebHistoryItem&, WebHistoryLoadType, WebURLRequest::CachePolicy) override;
     void loadData(
         const WebData&, const WebString& mimeType, const WebString& textEncoding,
         const WebURL& baseURL, const WebURL& unreachableURL, bool replace) override;
     void loadHTMLString(
         const WebData& html, const WebURL& baseURL, const WebURL& unreachableURL,
         bool replace) override;
@@ skipping 120 matching lines @@
     // cleared upon close().
     SelfKeepAlive<WebRemoteFrameImpl> m_selfKeepAlive;
 #endif
 };
 
 DEFINE_TYPE_CASTS(WebRemoteFrameImpl, WebFrame, frame, frame->isWebRemoteFrame(), frame.isWebRemoteFrame());
 
 } // namespace blink
 
 #endif // WebRemoteFrameImpl_h