Move MainWorldScriptContext accessor/method from WebFrame to WebLocalFrame.

third_party/WebKit/public/web/WebLocalFrame.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 WebLocalFrame_h
 #define WebLocalFrame_h
 
 #include <set>
 #include "WebCompositionUnderline.h"
 #include "WebFrame.h"
 #include "WebFrameLoadType.h"
 #include "WebHistoryItem.h"
 #include "public/platform/WebCachePolicy.h"
 #include "public/platform/WebURLError.h"
 #include "public/platform/WebURLRequest.h"
 #include "public/platform/site_engagement.mojom-shared.h"
+#include "v8/include/v8.h"
 
 namespace base {
 class SingleThreadTaskRunner;
 }
 
 namespace blink {
 
 class InterfaceProvider;
 class InterfaceRegistry;
 class WebAutofillClient;
@@ skipping 262 matching lines @@
   // Returns the value for a page property that is only defined when printing.
   // printBegin must have been called before this method.
   virtual WebString PageProperty(const WebString& property_name,
                                  int page_index) = 0;
 
   // Scripting --------------------------------------------------------------
 
   // Executes script in the context of the current page.
   virtual void ExecuteScript(const WebScriptSource&) = 0;
 
+  // Returns the V8 context for associated with the main world and this
+  // frame. There can be many V8 contexts associated with this frame, one for
+  // each isolated world and one for the main world. If you don't know what
+  // the "main world" or an "isolated world" is, then you probably shouldn't
+  // be calling this API.
+  virtual v8::Local<v8::Context> MainWorldScriptContext() const = 0;
+
   // Executes script in the context of the current page and returns the value
   // that the script evaluated to with callback. Script execution can be
   // suspend.
   // DEPRECATED: Prefer requestExecuteScriptInIsolatedWorld().
   virtual void RequestExecuteScriptAndReturnValue(
       const WebScriptSource&,
       bool user_gesture,
       WebScriptExecutionCallback*) = 0;
 
   // Requests execution of the given function, but allowing for script
@@ skipping 324 matching lines @@
   // to call these on a WebLocalFrame.
   bool IsWebLocalFrame() const override = 0;
   WebLocalFrame* ToWebLocalFrame() override = 0;
   bool IsWebRemoteFrame() const override = 0;
   WebRemoteFrame* ToWebRemoteFrame() override = 0;
 };
 
 }  // namespace blink
 
 #endif  // WebLocalFrame_h