Use the current context as the creation context for cross-origin objects.

third_party/WebKit/Source/core/frame/Location.h

 /*
  * Copyright (C) 2008, 2010 Apple 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:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 16 matching lines @@
  */
 
 #ifndef Location_h
 #define Location_h
 
 #include "bindings/core/v8/ScriptValue.h"
 #include "bindings/core/v8/ScriptWrappable.h"
 #include "core/CoreExport.h"
 #include "core/dom/DOMStringList.h"
 #include "wtf/text/WTFString.h"
+#include <v8/include/v8.h>
 
 namespace blink {
 
 class LocalDOMWindow;
 class ExceptionState;
 class Frame;
 class KURL;
 
 // This class corresponds to the JS Location API, which is the only DOM API
 // besides Window that is operable in a RemoteFrame. Location needs to be
@@ skipping 63 matching lines @@
   String origin() const;
 
   DOMStringList* ancestorOrigins() const;
 
   // Just return the |this| object the way the normal valueOf function on the
   // Object prototype would.  The valueOf function is only added to make sure
   // that it cannot be overwritten on location objects, since that would provide
   // a hook to change the string conversion behavior of location objects.
   ScriptValue valueOf(const ScriptValue& thisObject) { return thisObject; }
 
+  // v8 wrapper used only for cross-origin accesses.
+  v8::Local<v8::Object> crossOriginWrapper(v8::Isolate*);
+
   DECLARE_VIRTUAL_TRACE();
 
  private:
   explicit Location(Frame*);
 
   enum class SetLocationPolicy { Normal, ReplaceThisFrame };
   void setLocation(const String&,
                    LocalDOMWindow* currentWindow,
                    LocalDOMWindow* enteredWindow,
                    ExceptionState* = nullptr,
                    SetLocationPolicy = SetLocationPolicy::Normal);
 
   const KURL& url() const;
 
   Member<Frame> m_frame;
+  v8::Persistent<v8::Object> m_crossOriginWrapper;
 };
 
 }  // namespace blink
 
 #endif  // Location_h