[Cleanup] Const-correct the profile() method for the EasyUnlockService

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 201 matching lines @@
   virtual bool IsAllowedInternal() const = 0;
 
   // Called while processing a user gesture to unlock the screen using Easy
   // Unlock, just before the screen is unlocked.
   virtual void OnWillFinalizeUnlock(bool success) = 0;
 
   // KeyedService override:
   void Shutdown() override;
 
   // Exposes the profile to which the service is attached to subclasses.
-  Profile* profile() const { return profile_; }
+  const Profile* profile() const { return profile_; }
+  Profile* profile() { return profile_; }
 
   // Opens an Easy Unlock Setup app window.
   void OpenSetupApp();
 
   // Reloads the Easy unlock component app if it's loaded and resets the lock
   // screen state.
   void ReloadAppAndLockScreen();
 
   // Checks whether Easy unlock should be running and updates app state.
   void UpdateAppState();
@@ skipping 87 matching lines @@
   bool tpm_key_checked_;
 
   ObserverList<EasyUnlockServiceObserver> observers_;
 
   base::WeakPtrFactory<EasyUnlockService> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(EasyUnlockService);
 };
 
 #endif  // CHROME_BROWSER_SIGNIN_EASY_UNLOCK_SERVICE_H_