Introduce PrefRegistrySyncable, simplifying PrefServiceSyncable.

chrome/browser/chromeos/preferences.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 "chrome/browser/chromeos/preferences.h"
 
 #include "ash/magnifier/magnifier_constants.h"
 #include "base/chromeos/chromeos_version.h"
 #include "base/command_line.h"
 #include "base/i18n/time_formatting.h"
 #include "base/metrics/histogram.h"
 #include "base/prefs/public/pref_member.h"
 #include "base/string_split.h"
 #include "base/string_util.h"
 #include "base/utf_string_conversions.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/chromeos/accessibility/magnification_manager.h"
 #include "chrome/browser/chromeos/drive/drive_file_system_util.h"
 #include "chrome/browser/chromeos/input_method/input_method_configuration.h"
 #include "chrome/browser/chromeos/input_method/input_method_manager.h"
 #include "chrome/browser/chromeos/input_method/input_method_util.h"
 #include "chrome/browser/chromeos/input_method/xkeyboard.h"
 #include "chrome/browser/chromeos/login/login_utils.h"
 #include "chrome/browser/chromeos/login/user_manager.h"
 #include "chrome/browser/chromeos/system/drm_settings.h"
 #include "chrome/browser/chromeos/system/input_device_settings.h"
 #include "chrome/browser/chromeos/system/power_manager_settings.h"
 #include "chrome/browser/chromeos/system/statistics_provider.h"
 #include "chrome/browser/download/download_util.h"
-#include "chrome/browser/prefs/pref_service.h"
+#include "chrome/browser/prefs/pref_registry_syncable.h"
+#include "chrome/browser/prefs/pref_service_syncable.h"
 #include "chrome/browser/prefs/scoped_user_pref_update.h"
 #include "chrome/common/chrome_notification_types.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/pref_names.h"
 #include "googleurl/src/gurl.h"
 #include "third_party/icu/public/i18n/unicode/timezone.h"
 #include "ui/base/events/event_constants.h"
 #include "ui/base/events/event_utils.h"
 
 namespace chromeos {
 
 static const char kFallbackInputMethodLocale[] = "en-US";
 
 Preferences::Preferences()
     : prefs_(NULL),
       input_method_manager_(input_method::GetInputMethodManager()) {
 }
 
 Preferences::Preferences(input_method::InputMethodManager* input_method_manager)
     : input_method_manager_(input_method_manager) {
 }
 
 Preferences::~Preferences() {
   prefs_->RemoveObserver(this);
 }
 
 // static
-void Preferences::RegisterUserPrefs(PrefServiceSyncable* prefs) {
+void Preferences::RegisterUserPrefs(PrefService* prefs,
+                                    PrefRegistrySyncable* registry) {
   std::string hardware_keyboard_id;
   // TODO(yusukes): Remove the runtime hack.
   if (base::chromeos::IsRunningOnChromeOS()) {
     input_method::InputMethodManager* manager =
         input_method::GetInputMethodManager();
     if (manager) {
       hardware_keyboard_id =
           manager->GetInputMethodUtil()->GetHardwareInputMethodId();
     }
   } else {
     hardware_keyboard_id = "xkb:us::eng";  // only for testing.
   }
 
-  prefs->RegisterBooleanPref(prefs::kTapToClickEnabled,
-                             true,
-                             PrefServiceSyncable::SYNCABLE_PREF);
-  prefs->RegisterBooleanPref(prefs::kTapDraggingEnabled,
-                             false,
-                             PrefServiceSyncable::SYNCABLE_PREF);
-  prefs->RegisterBooleanPref(prefs::kEnableTouchpadThreeFingerClick,
-                             false,
-                             PrefServiceSyncable::UNSYNCABLE_PREF);
-  prefs->RegisterBooleanPref(prefs::kEnableTouchpadThreeFingerSwipe,
-                             false,
-                             PrefServiceSyncable::UNSYNCABLE_PREF);
-  prefs->RegisterBooleanPref(
+  registry->RegisterBooleanPref(prefs::kTapToClickEnabled,
+                                true,
+                                PrefRegistrySyncable::SYNCABLE_PREF);
+  registry->RegisterBooleanPref(prefs::kTapDraggingEnabled,
+                                false,
+                                PrefRegistrySyncable::SYNCABLE_PREF);
+  registry->RegisterBooleanPref(prefs::kEnableTouchpadThreeFingerClick,
+                                false,
+                                PrefRegistrySyncable::UNSYNCABLE_PREF);
+  registry->RegisterBooleanPref(prefs::kEnableTouchpadThreeFingerSwipe,
+                                false,
+                                PrefRegistrySyncable::UNSYNCABLE_PREF);
+  registry->RegisterBooleanPref(
       prefs::kNaturalScroll,
       CommandLine::ForCurrentProcess()->HasSwitch(
           switches::kNaturalScrollDefault),
-      PrefServiceSyncable::SYNCABLE_PREF);
-  prefs->RegisterBooleanPref(prefs::kPrimaryMouseButtonRight,
-                             false,
-                             PrefServiceSyncable::SYNCABLE_PREF);
-  prefs->RegisterBooleanPref(prefs::kLabsMediaplayerEnabled,
-                             false,
-                             PrefServiceSyncable::UNSYNCABLE_PREF);
-  prefs->RegisterBooleanPref(prefs::kLabsAdvancedFilesystemEnabled,
-                             false,
-                             PrefServiceSyncable::UNSYNCABLE_PREF);
+      PrefRegistrySyncable::SYNCABLE_PREF);
+  registry->RegisterBooleanPref(prefs::kPrimaryMouseButtonRight,
+                                false,
+                                PrefRegistrySyncable::SYNCABLE_PREF);
+  registry->RegisterBooleanPref(prefs::kLabsMediaplayerEnabled,
+                                false,
+                                PrefRegistrySyncable::UNSYNCABLE_PREF);
+  registry->RegisterBooleanPref(prefs::kLabsAdvancedFilesystemEnabled,
+                                false,
+                                PrefRegistrySyncable::UNSYNCABLE_PREF);
   // Check if the accessibility prefs are already registered, which can happen
   // in WizardController::RegisterPrefs. We still want to try to register
   // the prefs here in case of Chrome/Linux with ChromeOS=1.
   if (prefs->FindPreference(prefs::kSpokenFeedbackEnabled) == NULL) {

[Mattias Nissler (ping if slow), 2013/02/06 17:53:33]

TODO here?

[Jói, 2013/02/07 14:52:32]

Done.

-    prefs->RegisterBooleanPref(prefs::kSpokenFeedbackEnabled,
-                               false,
-                               PrefServiceSyncable::UNSYNCABLE_PREF);
+    registry->RegisterBooleanPref(prefs::kSpokenFeedbackEnabled,
+                                  false,
+                                  PrefRegistrySyncable::UNSYNCABLE_PREF);
   }
   if (prefs->FindPreference(prefs::kHighContrastEnabled) == NULL) {
-    prefs->RegisterBooleanPref(prefs::kHighContrastEnabled,
-                               false,
-                               PrefServiceSyncable::UNSYNCABLE_PREF);
+    registry->RegisterBooleanPref(prefs::kHighContrastEnabled,
+                                  false,
+                                  PrefRegistrySyncable::UNSYNCABLE_PREF);
   }
   if (prefs->FindPreference(prefs::kVirtualKeyboardEnabled) == NULL) {
-    prefs->RegisterBooleanPref(prefs::kVirtualKeyboardEnabled,
-                               false,
-                               PrefServiceSyncable::UNSYNCABLE_PREF);
-  }
-  prefs->RegisterBooleanPref(prefs::kScreenMagnifierEnabled,
-                             false,
-                             PrefServiceSyncable::SYNCABLE_PREF);
-  prefs->RegisterIntegerPref(prefs::kScreenMagnifierType,
-                             ash::kDefaultMagnifierType,
-                             PrefServiceSyncable::SYNCABLE_PREF);
-  prefs->RegisterDoublePref(prefs::kScreenMagnifierScale,
-                            std::numeric_limits<double>::min(),
-                            PrefServiceSyncable::UNSYNCABLE_PREF);
-  prefs->RegisterBooleanPref(prefs::kShouldAlwaysShowAccessibilityMenu,
-                             false,
-                             PrefServiceSyncable::UNSYNCABLE_PREF);
-  prefs->RegisterIntegerPref(prefs::kMouseSensitivity,
-                             3,
-                             PrefServiceSyncable::SYNCABLE_PREF);
-  prefs->RegisterIntegerPref(prefs::kTouchpadSensitivity,
-                             3,
-                             PrefServiceSyncable::SYNCABLE_PREF);
-  prefs->RegisterBooleanPref(prefs::kUse24HourClock,
-                             base::GetHourClockType() == base::k24HourClock,
-                             PrefServiceSyncable::SYNCABLE_PREF);
-  prefs->RegisterBooleanPref(prefs::kDisableDrive,
-                             false,
-                             PrefServiceSyncable::SYNCABLE_PREF);
-  prefs->RegisterBooleanPref(prefs::kDisableDriveOverCellular,
-                             true,
-                             PrefServiceSyncable::SYNCABLE_PREF);
-  prefs->RegisterBooleanPref(prefs::kDisableDriveHostedFiles,
-                             false,
-                             PrefServiceSyncable::SYNCABLE_PREF);
+    registry->RegisterBooleanPref(prefs::kVirtualKeyboardEnabled,
+                                  false,
+                                  PrefRegistrySyncable::UNSYNCABLE_PREF);
+  }
+  registry->RegisterBooleanPref(prefs::kScreenMagnifierEnabled,
+                                false,
+                                PrefRegistrySyncable::SYNCABLE_PREF);
+  registry->RegisterIntegerPref(prefs::kScreenMagnifierType,
+                                ash::kDefaultMagnifierType,
+                                PrefRegistrySyncable::SYNCABLE_PREF);
+  registry->RegisterDoublePref(prefs::kScreenMagnifierScale,
+                               std::numeric_limits<double>::min(),
+                               PrefRegistrySyncable::UNSYNCABLE_PREF);
+  registry->RegisterBooleanPref(prefs::kShouldAlwaysShowAccessibilityMenu,
+                                false,
+                                PrefRegistrySyncable::UNSYNCABLE_PREF);
+  registry->RegisterIntegerPref(prefs::kMouseSensitivity,
+                                3,
+                                PrefRegistrySyncable::SYNCABLE_PREF);
+  registry->RegisterIntegerPref(prefs::kTouchpadSensitivity,
+                                3,
+                                PrefRegistrySyncable::SYNCABLE_PREF);
+  registry->RegisterBooleanPref(prefs::kUse24HourClock,
+                                base::GetHourClockType() == base::k24HourClock,
+                                PrefRegistrySyncable::SYNCABLE_PREF);
+  registry->RegisterBooleanPref(prefs::kDisableDrive,
+                                false,
+                                PrefRegistrySyncable::SYNCABLE_PREF);
+  registry->RegisterBooleanPref(prefs::kDisableDriveOverCellular,
+                                true,
+                                PrefRegistrySyncable::SYNCABLE_PREF);
+  registry->RegisterBooleanPref(prefs::kDisableDriveHostedFiles,
+                                false,
+                                PrefRegistrySyncable::SYNCABLE_PREF);
   // We don't sync prefs::kLanguageCurrentInputMethod and PreviousInputMethod
   // because they're just used to track the logout state of the device.
-  prefs->RegisterStringPref(prefs::kLanguageCurrentInputMethod,
+  registry->RegisterStringPref(prefs::kLanguageCurrentInputMethod,
+                               "",
+                               PrefRegistrySyncable::UNSYNCABLE_PREF);
+  registry->RegisterStringPref(prefs::kLanguagePreviousInputMethod,
                             "",
-                            PrefServiceSyncable::UNSYNCABLE_PREF);
-  prefs->RegisterStringPref(prefs::kLanguagePreviousInputMethod,
-                            "",
-                            PrefServiceSyncable::UNSYNCABLE_PREF);
+                            PrefRegistrySyncable::UNSYNCABLE_PREF);
   // We don't sync the list of input methods and preferred languages since a
   // user might use two or more devices with different hardware keyboards.
   // crosbug.com/15181
-  prefs->RegisterStringPref(prefs::kLanguagePreferredLanguages,
-                            kFallbackInputMethodLocale,
-                            PrefServiceSyncable::UNSYNCABLE_PREF);
-  prefs->RegisterStringPref(prefs::kLanguagePreloadEngines,
-                            hardware_keyboard_id,
-                            PrefServiceSyncable::UNSYNCABLE_PREF);
-  prefs->RegisterStringPref(prefs::kLanguageFilteredExtensionImes,
-                            "",
-                            PrefServiceSyncable::UNSYNCABLE_PREF);
+  registry->RegisterStringPref(prefs::kLanguagePreferredLanguages,
+                               kFallbackInputMethodLocale,
+                               PrefRegistrySyncable::UNSYNCABLE_PREF);
+  registry->RegisterStringPref(prefs::kLanguagePreloadEngines,
+                               hardware_keyboard_id,
+                               PrefRegistrySyncable::UNSYNCABLE_PREF);
+  registry->RegisterStringPref(prefs::kLanguageFilteredExtensionImes,
+                               "",
+                               PrefRegistrySyncable::UNSYNCABLE_PREF);
   for (size_t i = 0; i < language_prefs::kNumChewingBooleanPrefs; ++i) {
-    prefs->RegisterBooleanPref(
+    registry->RegisterBooleanPref(
         language_prefs::kChewingBooleanPrefs[i].pref_name,
         language_prefs::kChewingBooleanPrefs[i].default_pref_value,
         language_prefs::kChewingBooleanPrefs[i].sync_status);
   }
   for (size_t i = 0; i < language_prefs::kNumChewingMultipleChoicePrefs; ++i) {
-    prefs->RegisterStringPref(
+    registry->RegisterStringPref(
         language_prefs::kChewingMultipleChoicePrefs[i].pref_name,
         language_prefs::kChewingMultipleChoicePrefs[i].default_pref_value,
         language_prefs::kChewingMultipleChoicePrefs[i].sync_status);
   }
-  prefs->RegisterIntegerPref(
+  registry->RegisterIntegerPref(
       language_prefs::kChewingHsuSelKeyType.pref_name,
       language_prefs::kChewingHsuSelKeyType.default_pref_value,
       language_prefs::kChewingHsuSelKeyType.sync_status);
 
   for (size_t i = 0; i < language_prefs::kNumChewingIntegerPrefs; ++i) {
-    prefs->RegisterIntegerPref(
+    registry->RegisterIntegerPref(
         language_prefs::kChewingIntegerPrefs[i].pref_name,
         language_prefs::kChewingIntegerPrefs[i].default_pref_value,
         language_prefs::kChewingIntegerPrefs[i].sync_status);
   }
-  prefs->RegisterStringPref(
+  registry->RegisterStringPref(
       prefs::kLanguageHangulKeyboard,
       language_prefs::kHangulKeyboardNameIDPairs[0].keyboard_id,
-      PrefServiceSyncable::SYNCABLE_PREF);
-  prefs->RegisterStringPref(prefs::kLanguageHangulHanjaBindingKeys,
-                            language_prefs::kHangulHanjaBindingKeys,
-                            // Don't sync the pref as it's not user-configurable
-                            PrefServiceSyncable::UNSYNCABLE_PREF);
+      PrefRegistrySyncable::SYNCABLE_PREF);
+  registry->RegisterStringPref(
+      prefs::kLanguageHangulHanjaBindingKeys,
+      language_prefs::kHangulHanjaBindingKeys,
+      // Don't sync the pref as it's not user-configurable
+      PrefRegistrySyncable::UNSYNCABLE_PREF);
   for (size_t i = 0; i < language_prefs::kNumPinyinBooleanPrefs; ++i) {
-    prefs->RegisterBooleanPref(
+    registry->RegisterBooleanPref(
         language_prefs::kPinyinBooleanPrefs[i].pref_name,
         language_prefs::kPinyinBooleanPrefs[i].default_pref_value,
         language_prefs::kPinyinBooleanPrefs[i].sync_status);
   }
   for (size_t i = 0; i < language_prefs::kNumPinyinIntegerPrefs; ++i) {
-    prefs->RegisterIntegerPref(
+    registry->RegisterIntegerPref(
         language_prefs::kPinyinIntegerPrefs[i].pref_name,
         language_prefs::kPinyinIntegerPrefs[i].default_pref_value,
         language_prefs::kPinyinIntegerPrefs[i].sync_status);
   }
-  prefs->RegisterIntegerPref(
+  registry->RegisterIntegerPref(
       language_prefs::kPinyinDoublePinyinSchema.pref_name,
       language_prefs::kPinyinDoublePinyinSchema.default_pref_value,
-      PrefServiceSyncable::UNSYNCABLE_PREF);
+      PrefRegistrySyncable::UNSYNCABLE_PREF);
 
   for (size_t i = 0; i < language_prefs::kNumMozcBooleanPrefs; ++i) {
-    prefs->RegisterBooleanPref(
+    registry->RegisterBooleanPref(
         language_prefs::kMozcBooleanPrefs[i].pref_name,
         language_prefs::kMozcBooleanPrefs[i].default_pref_value,
         language_prefs::kMozcBooleanPrefs[i].sync_status);
   }
   for (size_t i = 0; i < language_prefs::kNumMozcMultipleChoicePrefs; ++i) {
-    prefs->RegisterStringPref(
+    registry->RegisterStringPref(
         language_prefs::kMozcMultipleChoicePrefs[i].pref_name,
         language_prefs::kMozcMultipleChoicePrefs[i].default_pref_value,
         language_prefs::kMozcMultipleChoicePrefs[i].sync_status);
   }
   for (size_t i = 0; i < language_prefs::kNumMozcIntegerPrefs; ++i) {
-    prefs->RegisterIntegerPref(
+    registry->RegisterIntegerPref(
         language_prefs::kMozcIntegerPrefs[i].pref_name,
         language_prefs::kMozcIntegerPrefs[i].default_pref_value,
         language_prefs::kMozcIntegerPrefs[i].sync_status);
   }
-  prefs->RegisterIntegerPref(prefs::kLanguageRemapSearchKeyTo,
-                             input_method::kSearchKey,
-                             PrefServiceSyncable::SYNCABLE_PREF);
-  prefs->RegisterIntegerPref(prefs::kLanguageRemapControlKeyTo,
-                             input_method::kControlKey,
-                             PrefServiceSyncable::SYNCABLE_PREF);
-  prefs->RegisterIntegerPref(prefs::kLanguageRemapAltKeyTo,
-                             input_method::kAltKey,
-                             PrefServiceSyncable::SYNCABLE_PREF);
-  prefs->RegisterIntegerPref(prefs::kLanguageRemapCapsLockKeyTo,
-                             input_method::kCapsLockKey,
-                             PrefServiceSyncable::SYNCABLE_PREF);
-  prefs->RegisterIntegerPref(prefs::kLanguageRemapDiamondKeyTo,
-                             input_method::kControlKey,
-                             PrefServiceSyncable::SYNCABLE_PREF);
+  registry->RegisterIntegerPref(prefs::kLanguageRemapSearchKeyTo,
+                                input_method::kSearchKey,
+                                PrefRegistrySyncable::SYNCABLE_PREF);
+  registry->RegisterIntegerPref(prefs::kLanguageRemapControlKeyTo,
+                                input_method::kControlKey,
+                                PrefRegistrySyncable::SYNCABLE_PREF);
+  registry->RegisterIntegerPref(prefs::kLanguageRemapAltKeyTo,
+                                input_method::kAltKey,
+                                PrefRegistrySyncable::SYNCABLE_PREF);
+  registry->RegisterIntegerPref(prefs::kLanguageRemapCapsLockKeyTo,
+                                input_method::kCapsLockKey,
+                                PrefRegistrySyncable::SYNCABLE_PREF);
+  registry->RegisterIntegerPref(prefs::kLanguageRemapDiamondKeyTo,
+                                input_method::kControlKey,
+                                PrefRegistrySyncable::SYNCABLE_PREF);
   // We don't sync the following keyboard prefs since they are not user-
   // configurable.
-  prefs->RegisterBooleanPref(prefs::kLanguageXkbAutoRepeatEnabled,
-                             true,
-                             PrefServiceSyncable::UNSYNCABLE_PREF);
-  prefs->RegisterIntegerPref(prefs::kLanguageXkbAutoRepeatDelay,
-                             language_prefs::kXkbAutoRepeatDelayInMs,
-                             PrefServiceSyncable::UNSYNCABLE_PREF);
-  prefs->RegisterIntegerPref(prefs::kLanguageXkbAutoRepeatInterval,
-                             language_prefs::kXkbAutoRepeatIntervalInMs,
-                             PrefServiceSyncable::UNSYNCABLE_PREF);
+  registry->RegisterBooleanPref(prefs::kLanguageXkbAutoRepeatEnabled,
+                                true,
+                                PrefRegistrySyncable::UNSYNCABLE_PREF);
+  registry->RegisterIntegerPref(prefs::kLanguageXkbAutoRepeatDelay,
+                                language_prefs::kXkbAutoRepeatDelayInMs,
+                                PrefRegistrySyncable::UNSYNCABLE_PREF);
+  registry->RegisterIntegerPref(prefs::kLanguageXkbAutoRepeatInterval,
+                                language_prefs::kXkbAutoRepeatIntervalInMs,
+                                PrefRegistrySyncable::UNSYNCABLE_PREF);
 
   // Screen lock default to off.
-  prefs->RegisterBooleanPref(prefs::kEnableScreenLock,
-                             false,
-                             PrefServiceSyncable::SYNCABLE_PREF);
+  registry->RegisterBooleanPref(prefs::kEnableScreenLock,
+                                false,
+                                PrefRegistrySyncable::SYNCABLE_PREF);
 
   // Mobile plan notifications default to on.
-  prefs->RegisterBooleanPref(prefs::kShowPlanNotifications,
-                             true,
-                             PrefServiceSyncable::SYNCABLE_PREF);
+  registry->RegisterBooleanPref(prefs::kShowPlanNotifications,
+                                true,
+                                PrefRegistrySyncable::SYNCABLE_PREF);
 
   // 3G first-time usage promo will be shown at least once.
-  prefs->RegisterBooleanPref(prefs::kShow3gPromoNotification,
-                             true,
-                             PrefServiceSyncable::UNSYNCABLE_PREF);
+  registry->RegisterBooleanPref(prefs::kShow3gPromoNotification,
+                                true,
+                                PrefRegistrySyncable::UNSYNCABLE_PREF);
 
   // Initially all existing users would see "What's new"
   // for current version after update.
-  prefs->RegisterStringPref(prefs::kChromeOSReleaseNotesVersion,
-                            "0.0.0.0",
-                            PrefServiceSyncable::SYNCABLE_PREF);
+  registry->RegisterStringPref(prefs::kChromeOSReleaseNotesVersion,
+                               "0.0.0.0",
+                               PrefRegistrySyncable::SYNCABLE_PREF);
 
   if (CommandLine::ForCurrentProcess()->HasSwitch(switches::kForceOAuth1)) {
     // Legacy OAuth1 all access token and secret pair.
-    prefs->RegisterStringPref(prefs::kOAuth1Token,
-                              "",
-                              PrefServiceSyncable::UNSYNCABLE_PREF);
-    prefs->RegisterStringPref(prefs::kOAuth1Secret,
-                              "",
-                              PrefServiceSyncable::UNSYNCABLE_PREF);
+    registry->RegisterStringPref(prefs::kOAuth1Token,
+                                 "",
+                                 PrefRegistrySyncable::UNSYNCABLE_PREF);
+    registry->RegisterStringPref(prefs::kOAuth1Secret,
+                                 "",
+                                 PrefRegistrySyncable::UNSYNCABLE_PREF);
   }
 
   // TODO(wad): Once UI is connected, a final default can be set. At that point
   // change this pref from UNSYNCABLE to SYNCABLE.
-  prefs->RegisterBooleanPref(prefs::kEnableCrosDRM,
-                             true,
-                             PrefServiceSyncable::UNSYNCABLE_PREF);
-
-  prefs->RegisterBooleanPref(prefs::kExternalStorageDisabled,
-                             false,
-                             PrefServiceSyncable::UNSYNCABLE_PREF);
+  registry->RegisterBooleanPref(prefs::kEnableCrosDRM,
+                                true,
+                                PrefRegistrySyncable::UNSYNCABLE_PREF);
+
+  registry->RegisterBooleanPref(prefs::kExternalStorageDisabled,
+                                false,
+                                PrefRegistrySyncable::UNSYNCABLE_PREF);
 }
 
 void Preferences::InitUserPrefs(PrefServiceSyncable* prefs) {
   prefs_ = prefs;
 
   BooleanPrefMember::NamedChangeCallback callback =
       base::Bind(&Preferences::OnPreferenceChanged, base::Unretained(this));
 
   tap_to_click_enabled_.Init(prefs::kTapToClickEnabled, prefs, callback);
   tap_dragging_enabled_.Init(prefs::kTapDraggingEnabled, prefs, callback);
@@ skipping 479 matching lines @@
 
   input_method::AutoRepeatRate rate;
   rate.initial_delay_in_ms = xkb_auto_repeat_delay_pref_.GetValue();
   rate.repeat_interval_in_ms = xkb_auto_repeat_interval_pref_.GetValue();
   DCHECK(rate.initial_delay_in_ms > 0);
   DCHECK(rate.repeat_interval_in_ms > 0);
   input_method::XKeyboard::SetAutoRepeatRate(rate);
 }
 
 }  // namespace chromeos