Use NativeComboboxViews instead of NativeComboboxWin on Windows.

ui/views/controls/combobox/native_combobox_win.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/views/controls/combobox/native_combobox_win.h"
 
 #include "base/i18n/rtl.h"
 #include "base/utf_string_conversions.h"
 #include "ui/base/events/event.h"
 #include "ui/base/models/combobox_model.h"
@@ skipping 190 matching lines @@
   HFONT font = Combobox::GetFont().GetNativeFont();
   SendMessage(native_view(), WM_SETFONT, reinterpret_cast<WPARAM>(font), FALSE);
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // NativeComboboxWrapper, public:
 
 // static
 NativeComboboxWrapper* NativeComboboxWrapper::CreateWrapper(
     Combobox* combobox) {
-#if defined(USE_AURA)
   return new NativeComboboxViews(combobox);
-#else
-  return new NativeComboboxWin(combobox);
-#endif
 }
 
 }  // namespace views