easy_unlock: When loading the easy-unlock app, make sure it's enabled

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 "base/macros.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
@@ skipping 70 matching lines @@
   // A class to detect whether a bluetooth adapter is present.
   class BluetoothDetector;
 
   // Initializes the service after ExtensionService is ready.
   void Initialize();
 
   // Installs the Easy unlock component app if it isn't installed or enables
   // the app if it is installed but disabled.
   void LoadApp();
 
-  // Disables the Easy unlock component app.
-  void DisableApp();
+  // Disables the Easy unlock component app if it's loaded.
+  void DisableAppIfLoaded();
 
   // Checks whether Easy unlock should be running and updates app state.
   void UpdateAppState();
 
   // Callback when the controlling pref changes.
   void OnPrefsChanged();
 
   // Callback when Bluetooth adapter present state changes.
   void OnBluetoothAdapterPresentChanged();
 
@@ skipping 18 matching lines @@
   class PowerMonitor;
   scoped_ptr<PowerMonitor> power_monitor_;
 #endif
 
   base::WeakPtrFactory<EasyUnlockService> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(EasyUnlockService);
 };
 
 #endif  // CHROME_BROWSER_SIGNIN_EASY_UNLOCK_SERVICE_H_