Move CEF V8 internal attributes to hidden values and add a test to verify safety (issue #316).

git-svn-id: https://chromiumembedded.googlecode.com/svn/trunk@361 5089003a-bbd8-11dd-ad1f-f1f9622dbc98

libcef/v8_impl.h

@@ -158,7 +158,8 @@ public:
     return v8_value_->GetHandle();
   }
 
-  bool IsReservedKey(const CefString& key);
+  // Returns the accessor assigned for the specified object, if any.
+  static CefV8Accessor* GetAccessor(v8::Handle<v8::Object> object);
 
 protected:
   scoped_refptr<CefV8ValueHandle> v8_value_;