Remove a deprecated wstring ToLower function.

views/controls/menu/menu_item_view.cc

 // Copyright (c) 2010 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 "views/controls/menu/menu_item_view.h"
 
 #include "app/l10n_util.h"
+#include "base/utf_string_conversions.h"
 #include "gfx/canvas.h"
 #include "grit/app_strings.h"
 #include "views/controls/button/text_button.h"
 #include "views/controls/button/menu_button.h"
 #include "views/controls/menu/menu_config.h"
 #include "views/controls/menu/menu_controller.h"
 #include "views/controls/menu/menu_separator.h"
 #include "views/controls/menu/submenu_view.h"
 
 #if defined(OS_WIN)
@@ skipping 291 matching lines @@
   if (!GetRootMenuItem()->has_mnemonics_)
     return 0;
 
   const std::wstring& title = GetTitle();
   size_t index = 0;
   do {
     index = title.find('&', index);
     if (index != std::wstring::npos) {
       if (index + 1 != title.size() && title[index + 1] != '&') {
         wchar_t char_array[1] = { title[index + 1] };
-        return l10n_util::ToLower(char_array)[0];
+        return UTF16ToWide(l10n_util::ToLower(WideToUTF16(char_array)))[0];
       }
       index++;
     }
   } while (index != std::wstring::npos);
   return 0;
 }
 
 MenuItemView* MenuItemView::GetMenuItemByID(int id) {
   if (GetCommand() == id)
     return this;
@@ skipping 273 matching lines @@
 }
 
 std::wstring MenuItemView::GetAcceleratorText() {
   Accelerator accelerator;
   return (GetDelegate() &&
           GetDelegate()->GetAccelerator(GetCommand(), &accelerator)) ?
       accelerator.GetShortcutText() : std::wstring();
 }
 
 }  // namespace views