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

ui/gfx/win/singleton_hwnd.cc

Index: ui/gfx/win/singleton_hwnd.cc
diff --git a/ui/gfx/win/singleton_hwnd.cc b/ui/gfx/win/singleton_hwnd.cc
index 2de6a8b8a1612d9fabbb6691b94c6499833e23a6..fc4d11f2d5e0d8146d9a3fa5c0f666e2e3c86676 100644
--- a/ui/gfx/win/singleton_hwnd.cc
+++ b/ui/gfx/win/singleton_hwnd.cc
@@ -37,8 +37,7 @@ BOOL SingletonHwnd::ProcessWindowMessage(HWND window,
 }
 
 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!";