Cleanup: Remove unnecessary define, since UnsafePersistent has indeed been removed.

chrome/renderer/extensions/object_backed_native_handler.cc

 // Copyright (c) 2012 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.
 
-// TODO(dcarney): Remove this when UnsafePersistent is removed.
-#define V8_ALLOW_ACCESS_TO_RAW_HANDLE_CONSTRUCTOR
-
 #include "chrome/renderer/extensions/object_backed_native_handler.h"
 
 #include "base/logging.h"
 #include "base/memory/linked_ptr.h"
 #include "chrome/renderer/extensions/chrome_v8_context.h"
 #include "chrome/renderer/extensions/console.h"
 #include "chrome/renderer/extensions/module_system.h"
 #include "v8/include/v8.h"
 
 namespace extensions {
@@ skipping 76 matching lines @@
         handler_function_value.As<v8::External>()->Value());
     data->Delete(v8::String::NewFromUtf8(isolate, kHandlerFunction));
   }
   router_data_.Clear();
   object_template_.reset();
   context_ = NULL;
   NativeHandler::Invalidate();
 }
 
 }   // namespace extensions