Enable the PIN keyboard on the lockscreen.

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

Index: chrome/browser/chromeos/login/quick_unlock/pin_storage_factory.cc
diff --git a/chrome/browser/chromeos/login/quick_unlock/pin_storage_factory.cc b/chrome/browser/chromeos/login/quick_unlock/pin_storage_factory.cc
index 2bebcc47e9c9ec61c9ab02e52b1c05f7267d7a49..4548dbb8e57abb90ab00b94333e6d1229931103b 100644
--- a/chrome/browser/chromeos/login/quick_unlock/pin_storage_factory.cc
+++ b/chrome/browser/chromeos/login/quick_unlock/pin_storage_factory.cc
@@ -5,8 +5,11 @@
 #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 {
 
@@ -17,6 +20,25 @@ PinStorage* PinStorageFactory::GetForProfile(Profile* profile) {
 }
 
 // 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();
 }