Add language_prefs namespace to language_preferences.h.

chrome/browser/chromeos/options/language_pinyin_config_view.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_PINYIN_CONFIG_VIEW_H_
 #define CHROME_BROWSER_CHROMEOS_OPTIONS_LANGUAGE_PINYIN_CONFIG_VIEW_H_
 #pragma once
 
 #include <string>
 
@@ skipping 47 matching lines @@
 
   // NotificationObserver overrides.
   virtual void Observe(NotificationType type,
                        const NotificationSource& source,
                        const NotificationDetails& details);
 
  private:
   // Updates the pinyin checkboxes.
   void NotifyPrefChanged();
 
-  BooleanPrefMember pinyin_boolean_prefs_[kNumPinyinBooleanPrefs];
+  BooleanPrefMember pinyin_boolean_prefs_[
+      language_prefs::kNumPinyinBooleanPrefs];
   // TODO(yusukes): Support integer prefs if needed.
   views::View* contents_;
 
   // A checkboxes for Pinyin.
-  views::Checkbox* pinyin_boolean_checkboxes_[kNumPinyinBooleanPrefs];
+  views::Checkbox* pinyin_boolean_checkboxes_[
+      language_prefs::kNumPinyinBooleanPrefs];
 
   struct DoublePinyinSchemaPrefAndAssociatedCombobox {
     IntegerPrefMember multiple_choice_pref;
     LanguageComboboxModel<int>* combobox_model;
     LanguageCombobox* combobox;
   } double_pinyin_schema_;
 
   DISALLOW_COPY_AND_ASSIGN(LanguagePinyinConfigView);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_OPTIONS_LANGUAGE_PINYIN_CONFIG_VIEW_H_