Move more methods from NWW to HWNDMessageHandler.

ui/base/win/shell.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/base/win/shell.h"
 
+#include <dwmapi.h>
 #include <shellapi.h>
 #include <shlobj.h>  // Must be before propkey.
 #include <propkey.h>
 
 #include "base/file_path.h"
 #include "base/native_library.h"
 #include "base/string_util.h"
 #include "base/win/metro.h"
 #include "base/win/scoped_comptr.h"
 #include "base/win/win_util.h"
@@ skipping 64 matching lines @@
 }
 
 void SetAppIdForWindow(const string16& app_id, HWND hwnd) {
   SetAppIdAndIconForWindow(app_id, string16(), hwnd);
 }
 
 void SetAppIconForWindow(const string16& app_icon, HWND hwnd) {
   SetAppIdAndIconForWindow(string16(), app_icon, hwnd);
 }
 
+bool IsAeroGlassEnabled() {
+  if (base::win::GetVersion() < base::win::VERSION_VISTA)
+    return false;
+  // If composition is not enabled, we behave like on XP.
+  BOOL enabled = FALSE;
+  return SUCCEEDED(DwmIsCompositionEnabled(&enabled)) && enabled;
+}
+
 }  // namespace win
 }  // namespace ui