[Easy Unlock] Update handling of the trial easy unlock/signin run

chrome/browser/signin/easy_unlock_service.h

Index: chrome/browser/signin/easy_unlock_service.h
diff --git a/chrome/browser/signin/easy_unlock_service.h b/chrome/browser/signin/easy_unlock_service.h
index c9064a6854555c6e052da65a52b251881e587cd0..da1abcb8cb956df92f07440226ba93bbfa82b89d 100644
--- a/chrome/browser/signin/easy_unlock_service.h
+++ b/chrome/browser/signin/easy_unlock_service.h
@@ -64,7 +64,7 @@ class EasyUnlockService : public KeyedService {
   static void RegisterPrefs(PrefRegistrySimple* registry);
 
   // Removes the hardlock state for the given user.
-  static void RemoveHardlockStateForUser(const std::string& user_id);
+  static void ResetLocalStateForUser(const std::string& user_id);
 
   // Returns the EasyUnlockService type.
   virtual Type GetType() const = 0;
@@ -216,6 +216,10 @@ class EasyUnlockService : public KeyedService {
       const std::string& user_id,
       EasyUnlockScreenlockStateHandler::HardlockState state);
 
+  // If needed, migrates prefs::kEasyUnlockShowTutorial pref from user prefs
+  // to local state.
+  void MaybeMigrateShowTutorialPref(const std::string& user_id);
+
 #if defined(OS_CHROMEOS)
   // Callback for get key operation from CheckCryptohomeKeysAndMaybeHardlock.
   void OnCryptohomeKeysFetchedForChecking(