Removes MessageLoop::Type checks in favor of IsCurrent on MessageLoops.

ui/gfx/win/singleton_hwnd.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.
 
 #include "ui/gfx/win/singleton_hwnd.h"
 
 #include "base/memory/singleton.h"
 #include "base/message_loop/message_loop.h"
 
 namespace gfx {
@@ skipping 19 matching lines @@
                                          LPARAM lparam,
                                          LRESULT& result,
                                          DWORD msg_map_id) {
   FOR_EACH_OBSERVER(Observer,
                     observer_list_,
                     OnWndProc(window, message, wparam, lparam));
   return false;
 }
 
 SingletonHwnd::SingletonHwnd() {
-  if (!base::MessageLoop::current() ||
-      base::MessageLoop::current()->type() != base::MessageLoop::TYPE_UI) {
+  if (!base::MessageLoopForUI::IsCurrent()) {
     // Creating this window in (e.g.) a renderer inhibits shutdown on
     // Windows. See http://crbug.com/230122 and http://crbug.com/236039.
     DLOG(ERROR) << "Cannot create windows on non-UI thread!";
     return;
   }
   WindowImpl::Init(NULL, Rect());
 }
 
 SingletonHwnd::~SingletonHwnd() {
 }
 
 }  // namespace gfx