Enable the PIN keyboard on the lockscreen.

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

 // 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.
 
 #include "chrome/browser/chromeos/login/quick_unlock/pin_storage_factory.h"
 
 #include "chrome/browser/chromeos/login/quick_unlock/pin_storage.h"
+#include "chrome/browser/chromeos/profiles/profile_helper.h"
 #include "chrome/browser/profiles/profile.h"
 #include "components/keyed_service/content/browser_context_dependency_manager.h"
+#include "components/user_manager/user.h"
+#include "components/user_manager/user_manager.h"
 
 namespace chromeos {
 
 // static
 PinStorage* PinStorageFactory::GetForProfile(Profile* profile) {
   return static_cast<PinStorage*>(
       GetInstance()->GetServiceForBrowserContext(profile, true));
 }
 
 // static
+PinStorage* PinStorageFactory::GetForUser(const user_manager::User* user) {
+  Profile* profile = ProfileHelper::Get()->GetProfileByUser(user);
+  if (!profile)
+    return nullptr;
+
+  return GetForProfile(profile);
+}
+
+// static
+PinStorage* PinStorageFactory::GetForAccountId(const AccountId& account_id) {
+  const user_manager::User* user =
+      user_manager::UserManager::Get()->FindUser(account_id);
+  if (!user)
+    return nullptr;
+
+  return GetForUser(user);
+}
+
+// static
 PinStorageFactory* PinStorageFactory::GetInstance() {
   return base::Singleton<PinStorageFactory>::get();
 }
 
 PinStorageFactory::PinStorageFactory()
     : BrowserContextKeyedServiceFactory(
           "PinStorageFactory",
           BrowserContextDependencyManager::GetInstance()) {}
 
 PinStorageFactory::~PinStorageFactory() {}
 
 KeyedService* PinStorageFactory::BuildServiceInstanceFor(
     content::BrowserContext* context) const {
   return new PinStorage(Profile::FromBrowserContext(context)->GetPrefs());
 }
 
 }  // namespace chromeos