Move UserContext to its own file

chrome/chrome_browser_chromeos.gypi

 # Copyright (c) 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.
 
 {
   'targets': [
     {
       'target_name': 'browser_chromeos',
       'type': 'static_library',
@@ skipping 496 matching lines @@
         'browser/chromeos/login/auth/online_attempt.cc',
         'browser/chromeos/login/auth/online_attempt.h',
         'browser/chromeos/login/auth/online_attempt_host.cc',
         'browser/chromeos/login/auth/online_attempt_host.h',
         'browser/chromeos/login/auth/parallel_authenticator.cc',
         'browser/chromeos/login/auth/parallel_authenticator.h',
         'browser/chromeos/login/auth/test_attempt_state.cc',
         'browser/chromeos/login/auth/test_attempt_state.h',
         'browser/chromeos/login/auth/tpm_password_fetcher.cc',
         'browser/chromeos/login/auth/tpm_password_fetcher.h',
+        'browser/chromeos/login/auth/user_context.cc',
+        'browser/chromeos/login/auth/user_context.h',
         'browser/chromeos/login/authentication_notification_details.h',
         'browser/chromeos/login/chrome_restart_request.cc',
         'browser/chromeos/login/chrome_restart_request.h',
         'browser/chromeos/login/default_pinned_apps_field_trial.cc',
         'browser/chromeos/login/default_pinned_apps_field_trial.h',
         'browser/chromeos/login/demo_mode/demo_app_launcher.cc',
         'browser/chromeos/login/demo_mode/demo_app_launcher.h',
         'browser/chromeos/login/enrollment/auto_enrollment_check_step.cc',
         'browser/chromeos/login/enrollment/auto_enrollment_check_step.h',
         'browser/chromeos/login/enrollment/auto_enrollment_controller.cc',
@@ skipping 608 matching lines @@
         'browser/chromeos/attestation/attestation_signed_data.proto',
       ],
       'variables': {
         'proto_in_dir': 'browser/chromeos/attestation',
         'proto_out_dir': 'chrome/browser/chromeos/attestation',
       },
       'includes': [ '../build/protoc.gypi' ]
     },
   ],
 }