Implement the "Configure modifier keys" drop-down

chrome/browser/chromeos/options/language_config_model.h

 // 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.
 
 #ifndef CHROME_BROWSER_CHROMEOS_OPTIONS_LANGUAGE_CONFIG_MODEL_H_
 #define CHROME_BROWSER_CHROMEOS_OPTIONS_LANGUAGE_CONFIG_MODEL_H_
 
 #include <map>
 #include <set>
 #include <string>
 #include <vector>
 
 #include "chrome/browser/language_combobox_model.h"
 #include "chrome/browser/pref_member.h"
 #include "chrome/browser/pref_service.h"
 #include "chrome/browser/profile.h"
 #include "chrome/common/notification_service.h"
 #include "cros/chromeos_input_method.h"
 
 namespace chromeos {
 
 // The combobox model is used for adding languages in the language config
 // view.
-class AddLanguageComboboxModel : public LanguageComboboxModel {
+class AddLanguageComboboxModel : public ::LanguageComboboxModel {
  public:
   AddLanguageComboboxModel(Profile* profile,
                            const std::vector<std::string>& locale_codes);
   // LanguageComboboxModel overrides.
   virtual int GetItemCount();
   virtual std::wstring GetItemAt(int index);
 
   // Converts the given index (index of the items in the combobox) to the
   // index of the internal language list. The returned index can be used
   // for GetLocaleFromIndex() and GetLanguageNameAt().
@@ skipping 103 matching lines @@
   std::vector<std::string> supported_language_codes_;
   // List of supported IME IDs like "pinyin" and "m17n:ar:kbd".
   std::vector<std::string> supported_input_method_ids_;
 
   DISALLOW_COPY_AND_ASSIGN(LanguageConfigModel);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_OPTIONS_LANGUAGE_CONFIG_MODEL_H_