cros: Allow timezone change for non guest users.

None guest users include authenticated users (regular user, owner), kiosk
users and login screen where there is no user.

BUG=340843

Review URL: https://codereview.chromium.org/154863003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@248901 0039d316-1c4b-4281-b951-d872f2087c98

chrome/browser/chromeos/settings/system_settings_provider.cc

@@ -33,7 +33,7 @@ SystemSettingsProvider::~SystemSettingsProvider() {
 void SystemSettingsProvider::DoSet(const std::string& path,
                                    const base::Value& in_value) {
   // Non-guest users can change the time zone.
-  if (!LoginState::Get()->IsUserAuthenticated())
+  if (LoginState::Get()->IsGuestUser())
     return;
 
   if (path == kSystemTimezone) {

chromeos/login/login_state.h

@@ -64,7 +64,7 @@ class CHROMEOS_EXPORT LoginState {
   // logged in, and only the owner will be allowed to log in).
   bool IsInSafeMode() const;
 
-  // Returns true if logged in and is a guest, retail, public, or kiosk user.
+  // Returns true if logged in and is a guest, retail, or public user.
   bool IsGuestUser() const;
 
   // Returns true if the user is an authenticated user (i.e. non public account)