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

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

Index: third_party/WebKit/Source/core/frame/Location.h
diff --git a/third_party/WebKit/Source/core/frame/Location.h b/third_party/WebKit/Source/core/frame/Location.h
index 2618f7902d3610eb1c71ca63c432991a7089bb46..a075dcaa693c62214f0e821d11aa1a7723cef817 100644
--- a/third_party/WebKit/Source/core/frame/Location.h
+++ b/third_party/WebKit/Source/core/frame/Location.h
@@ -34,6 +34,7 @@
 #include "core/CoreExport.h"
 #include "core/dom/DOMStringList.h"
 #include "wtf/text/WTFString.h"
+#include <v8/include/v8.h>
 
 namespace blink {
 
@@ -117,6 +118,9 @@ class CORE_EXPORT Location final : public GarbageCollected<Location>,
   // 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:
@@ -132,6 +136,7 @@ class CORE_EXPORT Location final : public GarbageCollected<Location>,
   const KURL& url() const;
 
   Member<Frame> m_frame;
+  v8::Persistent<v8::Object> m_crossOriginWrapper;
 };
 
 }  // namespace blink