ChromeOS: implement per-user time zone preferences.

chrome/common/pref_names.h

 // 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.
 
 // Constants for the names of various preferences, for easier changing.
 
 #ifndef CHROME_COMMON_PREF_NAMES_H_
 #define CHROME_COMMON_PREF_NAMES_H_
 
 #include <stddef.h>
@@ skipping 185 matching lines @@
 extern const char kHideWebStoreIcon[];
 #if defined(OS_CHROMEOS)
 extern const char kTapToClickEnabled[];
 extern const char kTapDraggingEnabled[];
 extern const char kEnableTouchpadThreeFingerClick[];
 extern const char kNaturalScroll[];
 extern const char kPrimaryMouseButtonRight[];
 extern const char kMouseSensitivity[];
 extern const char kTouchpadSensitivity[];
 extern const char kUse24HourClock[];
+extern const char kUserTimezone[];
 extern const char kResolveTimezoneByGeolocation[];
 // TODO(yusukes): Change "kLanguageABC" to "kABC". The current form is too long
 // to remember and confusing. The prefs are actually for input methods and i18n
 // keyboards, not UI languages.
 extern const char kLanguageCurrentInputMethod[];
 extern const char kLanguagePreviousInputMethod[];
 extern const char kLanguagePreferredLanguages[];
 extern const char kLanguagePreferredLanguagesSyncable[];
 extern const char kLanguagePreloadEngines[];
 extern const char kLanguagePreloadEnginesSyncable[];
@@ skipping 524 matching lines @@
 extern const char kBackgroundModeEnabled[];
 extern const char kHardwareAccelerationModeEnabled[];
 extern const char kHardwareAccelerationModePrevious[];
 
 extern const char kDevicePolicyRefreshRate[];
 
 extern const char kFactoryResetRequested[];
 extern const char kDebuggingFeaturesRequested[];
 
 #if defined(OS_CHROMEOS)
+extern const char kSigninScreenTimezone[];
 extern const char kResolveDeviceTimezoneByGeolocation[];
 extern const char kSystemTimezoneAutomaticDetectionPolicy[];
 #endif  // defined(OS_CHROMEOS)
 
 extern const char kEnableMediaRouter[];
 #if !defined(OS_ANDROID)
 extern const char kShowCastIconInToolbar[];
 #endif  // !defined(OS_ANDROID)
 
 #if !defined(OS_ANDROID)
@@ skipping 154 matching lines @@
 extern const char kSettingsResetPromptLastTriggeredForStartupUrls[];
 extern const char kSettingsResetPromptLastTriggeredForHomepage[];
 
 #if defined(OS_ANDROID)
 extern const char kClipboardLastModifiedTime[];
 #endif
 
 }  // namespace prefs
 
 #endif  // CHROME_COMMON_PREF_NAMES_H_