Reenabled ChromeOS system setting for timezone selection....

chrome/browser/chromeos/cros_settings_provider.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_CROS_SETTINGS_PROVIDER_H_
 #define CHROME_BROWSER_CHROMEOS_CROS_SETTINGS_PROVIDER_H_
 
 #include <string>
 
 class Value;
 
 namespace chromeos {
 
 class CrosSettingsProvider {
  public:
   virtual ~CrosSettingsProvider() {}
 
   // Sets |in_value| to given |path| in cros settings.
   // Note that this takes ownership of |in_value|.
   virtual void Set(const std::string& path, Value* in_value) = 0;
 
   // Gets settings value of given |path| to |out_value|.
   // Note that |out_value| is still owned by this class.
   virtual bool Get(const std::string& path, Value** out_value) const = 0;
 
   // Gets the namespace prefix provided by this provider
   virtual bool HandlesSetting(const std::string& path) = 0;
+
+ protected:
+  // Fires system setting change notification.
+  void FireObservers(const char* path);
+
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_CROS_SETTINGS_PROVIDER_H_