[Extensions] Clean up MessagingBindings

extensions/renderer/dispatcher.cc

 // 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.
 
 #include "extensions/renderer/dispatcher.h"
 
 #include <stddef.h>
 
 #include <memory>
 #include <utility>
@@ skipping 862 matching lines @@
       std::unique_ptr<NativeHandler>(new UserGesturesNativeHandler(context)));
   module_system->RegisterNativeHandler(
       "utils", std::unique_ptr<NativeHandler>(new UtilsNativeHandler(context)));
   module_system->RegisterNativeHandler(
       "v8_context",
       std::unique_ptr<NativeHandler>(new V8ContextNativeHandler(context)));
   module_system->RegisterNativeHandler(
       "event_natives",
       std::unique_ptr<NativeHandler>(new EventBindings(context)));
   module_system->RegisterNativeHandler(
-      "messaging_natives",
-      std::unique_ptr<NativeHandler>(MessagingBindings::Get(context)));
+      "messaging_natives", base::MakeUnique<MessagingBindings>(context));
   module_system->RegisterNativeHandler(
       "apiDefinitions", std::unique_ptr<NativeHandler>(
                             new ApiDefinitionsNatives(dispatcher, context)));
   module_system->RegisterNativeHandler(
       "sendRequest", std::unique_ptr<NativeHandler>(
                          new SendRequestNatives(request_sender, context)));
   module_system->RegisterNativeHandler(
       "setIcon", std::unique_ptr<NativeHandler>(new SetIconNatives(context)));
   module_system->RegisterNativeHandler(
       "activityLogger", std::unique_ptr<NativeHandler>(
@@ skipping 773 matching lines @@
   // The "guestViewDeny" module must always be loaded last. It registers
   // error-providing custom elements for the GuestView types that are not
   // available, and thus all of those types must have been checked and loaded
   // (or not loaded) beforehand.
   if (context_type == Feature::BLESSED_EXTENSION_CONTEXT) {
     module_system->Require("guestViewDeny");
   }
 }
 
 }  // namespace extensions