Use a direct include of strings headers in ui/, part 2.

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 <shlobj.h>  // Must be before propkey.
 #include <propkey.h>
 #include <shellapi.h>
 
 #include "base/files/file_path.h"
 #include "base/native_library.h"
-#include "base/string_util.h"
+#include "base/strings/string_util.h"
 #include "base/win/metro.h"
 #include "base/win/scoped_comptr.h"
 #include "base/win/win_util.h"
 #include "base/win/windows_version.h"
 
 namespace ui {
 namespace win {
 
 namespace {
 
@@ skipping 92 matching lines @@
 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