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diff --git a/chrome/browser/chromeos/preferences.h b/chrome/browser/chromeos/preferences.h
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+// Copyright (c) 2009 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_PREFERENCES_H_
+#define CHROME_BROWSER_CHROMEOS_PREFERENCES_H_
+
+#include <string>
+#include <vector>
+
+#include "chrome/browser/chromeos/language_preferences.h"
+#include "chrome/browser/pref_member.h"
+#include "chrome/common/notification_observer.h"
+
+class PrefService;
+
+namespace chromeos {
+
+// The Preferences class handles Chrome OS preferences. When the class
+// is first initialized, it will initialize the OS settings to what's stored in
+// the preferences. These include touchpad settings, etc.
+// When the preferences change, we change the settings to reflect the new value.
+class Preferences : public NotificationObserver {
+ public:
+  Preferences() {}
+  virtual ~Preferences() {}
+
+  // This method will register the prefs associated with Chrome OS settings.
+  static void RegisterUserPrefs(PrefService* prefs);
+
+  // This method will initialize Chrome OS settings to values in user prefs.
+  void Init(PrefService* prefs);
+
+  // Overridden from NotificationObserver:
+  virtual void Observe(NotificationType type,
+                       const NotificationSource& source,
+                       const NotificationDetails& details);
+
+ protected:
+  // This will set the OS settings when the preference changes.
+  // If this method is called with NULL, it will set all OS settings to what's
+  // stored in the preferences.
+  virtual void NotifyPrefChanged(const std::wstring* pref_name);
+
+ private:
+  // Writes boolean |value| to the input method (IBus) configuration daemon.
+  // |section| (e.g. "general") and |name| (e.g. "use_global_engine") should
+  // not be NULL.
+  void SetLanguageConfigBoolean(const char* section,
+                                const char* name,
+                                bool value);
+
+  // Writes integer |value| to the input method (IBus) configuration daemon.
+  // |section| and |name| should not be NULL.
+  void SetLanguageConfigInteger(const char* section,
+                                const char* name,
+                                int value);
+
+  // Writes string |value| to the input method (IBus) configuration daemon.
+  // |section| and |name| should not be NULL.
+  void SetLanguageConfigString(const char* section,
+                               const char* name,
+                               const std::string& value);
+
+  // Writes a string list to the input method (IBus) configuration daemon.
+  // |section| and |name| should not be NULL.
+  void SetLanguageConfigStringList(const char* section,
+                                   const char* name,
+                                   const std::vector<std::string>& values);
+
+  // A variant of SetLanguageConfigStringList. You can pass comma-separated
+  // values. Examples of |value|: "", "Control+space,Hiragana"
+  void SetLanguageConfigStringListAsCSV(const char* section,
+                                        const char* name,
+                                        const std::string& value);
+
+  BooleanPrefMember tap_to_click_enabled_;
+  BooleanPrefMember vert_edge_scroll_enabled_;
+  BooleanPrefMember accessibility_enabled_;
+  IntegerPrefMember speed_factor_;
+  IntegerPrefMember sensitivity_;
+
+  // Input method preferences.
+  StringPrefMember language_hotkey_next_engine_in_menu_;
+  StringPrefMember language_hotkey_previous_engine_;
+  StringPrefMember language_preferred_languages_;
+  StringPrefMember language_preload_engines_;
+  BooleanPrefMember language_chewing_boolean_prefs_[kNumChewingBooleanPrefs];
+  StringPrefMember language_chewing_multiple_choice_prefs_[
+      kNumChewingMultipleChoicePrefs];
+  IntegerPrefMember language_chewing_hsu_sel_key_type_;
+  IntegerPrefMember language_chewing_integer_prefs_[kNumChewingIntegerPrefs];
+  StringPrefMember language_hangul_keyboard_;
+  StringPrefMember language_hangul_hanja_keys_;
+  BooleanPrefMember language_pinyin_boolean_prefs_[kNumPinyinBooleanPrefs];
+  IntegerPrefMember language_pinyin_int_prefs_[kNumPinyinIntegerPrefs];
+  IntegerPrefMember language_pinyin_double_pinyin_schema_;
+  BooleanPrefMember language_mozc_boolean_prefs_[kNumMozcBooleanPrefs];
+  StringPrefMember language_mozc_multiple_choice_prefs_[
+      kNumMozcMultipleChoicePrefs];
+  IntegerPrefMember language_mozc_integer_prefs_[kNumMozcIntegerPrefs];
+
+  DISALLOW_COPY_AND_ASSIGN(Preferences);
+};
+
+}  // namespace chromeos
+
+#endif  // CHROME_BROWSER_CHROMEOS_PREFERENCES_H_