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

chrome/browser/signin/easy_unlock_service.h

 // Copyright 2014 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_SIGNIN_EASY_UNLOCK_SERVICE_H_
 #define CHROME_BROWSER_SIGNIN_EASY_UNLOCK_SERVICE_H_
 
 #include <set>
 #include <string>
 
@@ skipping 46 matching lines @@
   // logged in and his profile is initialized.
   static EasyUnlockService* GetForUser(const user_manager::User& user);
 
   // Registers Easy Unlock profile preferences.
   static void RegisterProfilePrefs(user_prefs::PrefRegistrySyncable* registry);
 
   // Registers Easy Unlock local state entries.
   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;
 
   // Returns the user currently associated with the service.
   virtual std::string GetUserEmail() const = 0;
 
   // Launches Easy Unlock Setup app.
   virtual void LaunchSetup() = 0;
 
@@ skipping 131 matching lines @@
 
   // Callback when Bluetooth adapter present state changes.
   void OnBluetoothAdapterPresentChanged();
 
   // Saves hardlock state for the given user. Update UI if the currently
   // associated user is the same.
   void SetHardlockStateForUser(
       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(
       const std::string& user_id,
       const std::set<std::string> paired_devices,
       bool success,
       const chromeos::EasyUnlockDeviceKeyDataList& key_data_list);
 #endif
 
   Profile* profile_;
@@ skipping 17 matching lines @@
   bool shut_down_;
 
   ObserverList<EasyUnlockServiceObserver> observers_;
 
   base::WeakPtrFactory<EasyUnlockService> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(EasyUnlockService);
 };
 
 #endif  // CHROME_BROWSER_SIGNIN_EASY_UNLOCK_SERVICE_H_