ChromeOS: Add SystemTimezoneAutomaticDetection policy.

chrome/browser/ui/webui/options/browser_options_handler.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.
 
 #ifndef CHROME_BROWSER_UI_WEBUI_OPTIONS_BROWSER_OPTIONS_HANDLER_H_
 #define CHROME_BROWSER_UI_WEBUI_OPTIONS_BROWSER_OPTIONS_HANDLER_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 206 matching lines @@
 
   // Updates the UI, allowing the user to change the wallpaper if |managed| is
   // |false| and preventing the user from changing the wallpaper if |managed| is
   // |true|.
   void OnWallpaperManagedChanged(bool managed);
 
   // Updates the UI, allowing the user to change the system time zone if
   // kSystemTimezonePolicy is set, and preventing the user from changing the
   // system time zone if kSystemTimezonePolicy is not set.
   void OnSystemTimezonePolicyChanged();
+
+  // Updates the UI, preventing the user from changing timezone or timezone
+  // detection settings if kSystemTimezoneAutomaticDetectionPolicy is set, and
+  // allowing the user to update these settings if
+  // kSystemTimezoneAutomaticDetectionPolicy is not set.
+  void OnSystemTimezoneAutomaticDetectionPolicyChanged();
 #endif
 
   // Callback for the "selectDownloadLocation" message. This will prompt the
   // user for a destination folder using platform-specific APIs.
   void HandleSelectDownloadLocation(const base::ListValue* args);
 
   // Callback for the "autoOpenFileTypesResetToDefault" message. This will
   // remove all auto-open file-type settings.
   void HandleAutoOpenButton(const base::ListValue* args);
 
@@ skipping 158 matching lines @@
 
   scoped_ptr<ChromeZoomLevelPrefs::DefaultZoomLevelSubscription>
       default_zoom_level_subscription_;
 
   PrefChangeRegistrar profile_pref_registrar_;
 #if defined(OS_CHROMEOS)
   scoped_ptr<policy::PolicyChangeRegistrar> policy_registrar_;
 
   // Whether factory reset can be performed.
   bool enable_factory_reset_;
+
+  PrefChangeRegistrar local_state_pref_change_registrar_;
 #endif
 
   ScopedObserver<SigninManagerBase, SigninManagerBase::Observer>
       signin_observer_;
 
   // Used to get WeakPtr to self for use on the UI thread.
   base::WeakPtrFactory<BrowserOptionsHandler> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(BrowserOptionsHandler);
 };
 
 }  // namespace options
 
 #endif  // CHROME_BROWSER_UI_WEBUI_OPTIONS_BROWSER_OPTIONS_HANDLER_H_