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

chrome/browser/signin/easy_unlock_screenlock_state_handler.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_SCREENLOCK_STATE_HANDLER_H_
 #define CHROME_BROWSER_SIGNIN_EASY_UNLOCK_SCREENLOCK_STATE_HANDLER_H_
 
 #include <string>
 
 #include "base/strings/string16.h"
@@ skipping 42 matching lines @@
     NO_PAIRING = 1 << 2        // Hard lock because there is no pairing data.
   };
 
   // |user_email|: The email for the user associated with the profile to which
   //     this class is attached.
   // |pref_service|: The profile preferences.
   // |screenlock_bridge|: The screenlock bridge used to update the screen lock
   //     state.
   EasyUnlockScreenlockStateHandler(const std::string& user_email,
                                    HardlockState initial_hardlock_state,
-                                   PrefService* pref_service,
+                                   PrefService* local_state,
                                    ScreenlockBridge* screenlock_bridge);
   virtual ~EasyUnlockScreenlockStateHandler();
 
   // Changes internal state to |new_state| and updates the user's screenlock
   // accordingly.
   void ChangeState(State new_state);
 
   // Updates the screenlock state.
   void SetHardlockState(HardlockState new_state);
 
@@ skipping 25 matching lines @@
 
   // Gets the name to be used for the device. The name depends on the device
   // type (example values: Chromebook and Chromebox).
   base::string16 GetDeviceName();
 
   // Updates the screenlock auth type if it has to be changed.
   void UpdateScreenlockAuthType();
 
   State state_;
   std::string user_email_;
-  PrefService* pref_service_;
+  PrefService* local_state_;
   ScreenlockBridge* screenlock_bridge_;
 
   // State of hardlock.
   HardlockState hardlock_state_;
   bool hardlock_ui_shown_;
 
   DISALLOW_COPY_AND_ASSIGN(EasyUnlockScreenlockStateHandler);
 };
 
 #endif  // CHROME_BROWSER_SIGNIN_EASY_UNLOCK_SCREENLOCK_STATE_HANDLER_H_