Move more methods from NWW to HWNDMessageHandler.

ui/base/win/shell.cc

Index: ui/base/win/shell.cc
===================================================================
--- ui/base/win/shell.cc	(revision 152769)
+++ ui/base/win/shell.cc	(working copy)
@@ -4,6 +4,7 @@
 
 #include "ui/base/win/shell.h"
 
+#include <dwmapi.h>
 #include <shellapi.h>
 #include <shlobj.h>  // Must be before propkey.
 #include <propkey.h>
@@ -88,5 +89,13 @@
   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