// NULL.
SigninErrorController* GetSigninErrorController(Profile* profile);
+// If the current active profile (given by prefs::kProfileLastUsed) is locked,
+// changes the active profile to the Guest profile and returns it, otherwise
+// returns NULL. This assumes that the Guest profile has been loaded.
+Profile* SetActiveProfileToGuestIfLocked();
+
} // namespace profiles
#endif // CHROME_BROWSER_PROFILES_PROFILES_STATE_H_