[Cleanup] Clean up Easy Unlock code a bit.

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 113 matching lines @@
                                        bool success) const = 0;
 
   // Records metrics for password based flow for the given user.
   virtual void RecordPasswordLoginEvent(const std::string& user_id) const = 0;
 
   // Whether easy unlock is allowed to be used. If the controlling preference
   // is set (from policy), this returns the preference value. Otherwise, it is
   // permitted either the flag is enabled or its field trial is enabled.
   bool IsAllowed();
 
+  // Whether Easy Unlock is currently enabled for this user.
+  bool IsEnabled() const;
+
   // Sets the hardlock state for the associated user.
   void SetHardlockState(EasyUnlockScreenlockStateHandler::HardlockState state);
 
   // Returns the hardlock state for the associated user.
   EasyUnlockScreenlockStateHandler::HardlockState GetHardlockState() const;
 
   // Gets the persisted hardlock state. Return true if there is persisted
   // hardlock state and the value would be set to |state|. Otherwise,
   // returns false and |state| is unchanged.
   bool GetPersistedHardlockState(
@@ skipping 41 matching lines @@
 
   // Does a service type specific initialization.
   virtual void InitializeInternal() = 0;
 
   // Does a service type specific shutdown. Called from |Shutdown|.
   virtual void ShutdownInternal() = 0;
 
   // 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;
+  virtual bool IsAllowedInternal() const = 0;
 
   // KeyedService override:
   void Shutdown() override;
 
   // Exposes the profile to which the service is attached to subclasses.
   Profile* profile() const { return profile_; }
 
   // Installs the Easy unlock component app if it isn't installed and enables
   // the app if it is disabled.
   void LoadApp();
@@ skipping 86 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_