Implement pin storage backend.

chrome/chrome_tests_unit.gypi

 # Copyright 2012 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.
 {
   'variables': {
     'chrome_unit_tests_sources': [
       # histograms.xml is analyzed by AboutFlagsHistogramTest, so this
       # dependency is needed to make commit bots run unit_tests on
       # histograms.xml changes.
       '../tools/metrics/histograms/histograms.xml',
@@ skipping 1020 matching lines @@
       'browser/chromeos/input_method/input_method_persistence_unittest.cc',
       'browser/chromeos/input_method/input_method_util_unittest.cc',
       'browser/chromeos/locale_change_guard_unittest.cc',
       'browser/chromeos/login/auth/cryptohome_authenticator_unittest.cc',
       'browser/chromeos/login/easy_unlock/easy_unlock_challenge_wrapper_unittest.cc',
       'browser/chromeos/login/easy_unlock/easy_unlock_tpm_key_manager_unittest.cc',
       'browser/chromeos/login/error_screens_histogram_helper_unittest.cc',
       'browser/chromeos/login/existing_user_controller_auto_login_unittest.cc',
       'browser/chromeos/login/hwid_checker_unittest.cc',
       'browser/chromeos/login/profile_auth_data_unittest.cc',
+      'browser/chromeos/login/quick_unlock/pin_storage_unittest.cc',
       'browser/chromeos/login/saml/saml_offline_signin_limiter_unittest.cc',
       'browser/chromeos/login/signin/merge_session_load_page_unittest.cc',
       'browser/chromeos/login/supervised/supervised_user_authentication_unittest.cc',
       'browser/chromeos/login/users/affiliation_unittest.cc',
       'browser/chromeos/login/users/multi_profile_user_controller_unittest.cc',
       'browser/chromeos/login/users/user_manager_unittest.cc',
       'browser/chromeos/login/users/wallpaper/wallpaper_manager_unittest.cc',
       'browser/chromeos/mobile/mobile_activator_unittest.cc',
       'browser/chromeos/mobile_config_unittest.cc',
       'browser/chromeos/net/cert_verify_proc_chromeos_unittest.cc',
@@ skipping 1945 matching lines @@
               'dependencies': [
                 '../tools/xdisplaycheck/xdisplaycheck.gyp:xdisplaycheck',
               ],
             }],
           ],
         },
       ],
     }],
   ],  # 'conditions'
 }