cros: Implement cryptohome backend for pin.

chrome/browser/chromeos/BUILD.gn

 # 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.
 
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//extensions/features/features.gni")
 import("//media/media_options.gni")
 import("//printing/features/features.gni")
 import("//third_party/protobuf/proto_library.gni")
@@ skipping 782 matching lines @@
     "login/lock/webui_screen_locker.cc",
     "login/lock/webui_screen_locker.h",
     "login/login_wizard.h",
     "login/oobe_screen.cc",
     "login/oobe_screen.h",
     "login/profile_auth_data.cc",
     "login/profile_auth_data.h",
     "login/proxy_settings_dialog.h",
     "login/quick_unlock/fingerprint_storage.cc",
     "login/quick_unlock/fingerprint_storage.h",
-    "login/quick_unlock/pin_storage.cc",
-    "login/quick_unlock/pin_storage.h",
+    "login/quick_unlock/pin_backend.cc",
+    "login/quick_unlock/pin_backend.h",
+    "login/quick_unlock/pin_storage_prefs.cc",
+    "login/quick_unlock/pin_storage_prefs.h",
     "login/quick_unlock/quick_unlock_factory.cc",
     "login/quick_unlock/quick_unlock_factory.h",
     "login/quick_unlock/quick_unlock_notification_controller.cc",
     "login/quick_unlock/quick_unlock_notification_controller.h",
     "login/quick_unlock/quick_unlock_storage.cc",
     "login/quick_unlock/quick_unlock_storage.h",
     "login/quick_unlock/quick_unlock_utils.cc",
     "login/quick_unlock/quick_unlock_utils.h",
     "login/reauth_stats.cc",
     "login/reauth_stats.h",
@@ skipping 855 matching lines @@
     "lock_screen_apps/state_controller_unittest.cc",
     "login/auth/cryptohome_authenticator_unittest.cc",
     "login/easy_unlock/easy_unlock_challenge_wrapper_unittest.cc",
     "login/easy_unlock/easy_unlock_tpm_key_manager_unittest.cc",
     "login/enrollment/enrollment_screen_unittest.cc",
     "login/error_screens_histogram_helper_unittest.cc",
     "login/existing_user_controller_auto_login_unittest.cc",
     "login/hwid_checker_unittest.cc",
     "login/profile_auth_data_unittest.cc",
     "login/quick_unlock/fingerprint_storage_unittest.cc",
-    "login/quick_unlock/pin_storage_unittest.cc",
+    "login/quick_unlock/pin_storage_prefs_unittest.cc",
     "login/quick_unlock/quick_unlock_storage_unittest.cc",
     "login/saml/saml_offline_signin_limiter_unittest.cc",
     "login/screens/network_screen_unittest.cc",
     "login/signin/merge_session_load_page_unittest.cc",
     "login/supervised/supervised_user_authentication_unittest.cc",
     "login/users/affiliation_unittest.cc",
     "login/users/multi_profile_user_controller_unittest.cc",
     "login/users/user_manager_unittest.cc",
     "login/users/wallpaper/wallpaper_manager_unittest.cc",
     "mobile/mobile_activator_unittest.cc",
@@ skipping 162 matching lines @@
     "policy/proto/chrome_device_policy.proto",
     "policy/proto/install_attributes.proto",
   ]
 }
 
 proto_library("attestation_proto") {
   sources = [
     "attestation/attestation_key_payload.proto",
   ]
 }