[Cleanup] Clean up Easy Unlock code a bit.

chrome/browser/signin/easy_unlock_service_signin_chromeos.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_SIGNIN_CHROMEOS_H_
 #define CHROME_BROWSER_SIGNIN_EASY_UNLOCK_SERVICE_SIGNIN_CHROMEOS_H_
 
 #include <map>
 #include <string>
 
@@ skipping 56 matching lines @@
   void RunTurnOffFlow() override;
   void ResetTurnOffFlow() override;
   TurnOffFlowStatus GetTurnOffFlowStatus() const override;
   std::string GetChallenge() const override;
   std::string GetWrappedSecret() const override;
   void RecordEasySignInOutcome(const std::string& user_id,
                                bool success) const override;
   void RecordPasswordLoginEvent(const std::string& user_id) const override;
   void InitializeInternal() override;
   void ShutdownInternal() override;
-  bool IsAllowedInternal() override;
+  bool IsAllowedInternal() const override;
 
   // ScreenlockBridge::Observer implementation:
   void OnScreenDidLock() override;
   void OnScreenDidUnlock() override;
   void OnFocusedUserChanged(const std::string& user_id) override;
 
   // chromeos::LoginState::Observer implementation:
   void LoggedInStateChanged() override;
 
   // Loads the device data associated with the user's Easy unlock keys from
@@ skipping 25 matching lines @@
   // Whether the service has been successfully initialized, and has not been
   // shut down.
   bool service_active_;
 
   base::WeakPtrFactory<EasyUnlockServiceSignin> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(EasyUnlockServiceSignin);
 };
 
 #endif  // CHROME_BROWSER_SIGNIN_EASY_UNLOCK_SERVICE_SIGNIN_CHROMEOS_H_