Enable the PIN keyboard on the lockscreen.

chrome/browser/chromeos/login/quick_unlock/pin_storage_factory.h

 // Copyright 2016 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_CHROMEOS_LOGIN_QUICK_UNLOCK_PIN_STORAGE_FACTORY_H_
 #define CHROME_BROWSER_CHROMEOS_LOGIN_QUICK_UNLOCK_PIN_STORAGE_FACTORY_H_
 
 #include "base/memory/singleton.h"
 #include "components/keyed_service/content/browser_context_keyed_service_factory.h"
+#include "components/signin/core/account_id/account_id.h"
 
 class Profile;
 
+namespace user_manager {
+class User;
+}
+
 namespace chromeos {
 
 class PinStorage;
 
 // Singleton that owns all PinStorage instances and associates them with
 // Profiles. Listens for the Profile's destruction notification and cleans up
 // the associated PinStorage.
 class PinStorageFactory : public BrowserContextKeyedServiceFactory {
  public:
   // Returns the PinStorage instance for |profile|.
   static PinStorage* GetForProfile(Profile* profile);
 
+  // Helper method that finds the PinStorage instance for |user|. This returns
+  // GetForProfile with the profile associated with |user|.
+  static PinStorage* GetForUser(const user_manager::User* user);
+
+  // Helper method that returns the PinStorage instance for |account_id|. This
+  // returns GetForProfile with the profile associated with |account_id|.
+  static PinStorage* GetForAccountId(const AccountId& account_id);
+
   static PinStorageFactory* GetInstance();
 
  private:
   friend struct base::DefaultSingletonTraits<PinStorageFactory>;
 
   PinStorageFactory();
   ~PinStorageFactory() override;
 
   // BrowserContextKeyedServiceFactory:
   KeyedService* BuildServiceInstanceFor(
       content::BrowserContext* profile) const override;
 
   DISALLOW_COPY_AND_ASSIGN(PinStorageFactory);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_LOGIN_QUICK_UNLOCK_PIN_STORAGE_FACTORY_H_