[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 180 matching lines @@
 
   // Service type specific tests for whether the service is allowed. Returns
   // false if service is not allowed. If true is returned, the service may still
   // not be allowed if common tests fail (e.g. if Bluetooth is not available).
   virtual bool IsAllowedInternal() = 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_; }
 
   // Installs the Easy unlock component app if it isn't installed and enables
   // the app if it is disabled.
   void LoadApp();
 
   // Disables the Easy unlock component app if it's loaded.
   void DisableAppIfLoaded();
 
   // Unloads the Easy unlock component app if it's loaded.
   void UnloadApp();
@@ skipping 80 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_