Move UI-relevant Windows files to ui/base.

ui/base/win/hwnd_util.cc

Index: ui/base/win/hwnd_util.cc
===================================================================
--- ui/base/win/hwnd_util.cc	(revision 0)
+++ ui/base/win/hwnd_util.cc	(working copy)
@@ -1,8 +1,8 @@
-// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// Copyright (c) 2011 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 "app/win/hwnd_util.h"
+#include "ui/base/win/hwnd_util.h"
 
 #include <dwmapi.h>
 
@@ -13,8 +13,7 @@
 
 #pragma comment(lib, "dwmapi.lib")
 
-namespace app {
-namespace win {
+namespace ui {
 
 namespace {
 
@@ -179,5 +178,4 @@
   return !!f;
 }
 
-}  // namespace win
-}  // namespace app
+}  // namespace ui