Added retry policy

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 1558 matching lines @@
     "input_method/input_method_configuration_unittest.cc",
     "input_method/input_method_engine_unittest.cc",
     "input_method/input_method_manager_impl_unittest.cc",
     "input_method/input_method_persistence_unittest.cc",
     "input_method/input_method_util_unittest.cc",
     "libc_close_tracking_unittest.cc",
     "locale_change_guard_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/enrollment/enterprise_enrollment_helper_mock.cc",
+    "login/enrollment/enterprise_enrollment_helper_mock.h",
+    "login/enrollment/mock_enrollment_screen.cc",
+    "login/enrollment/mock_enrollment_screen.h",

[xiyuan, 2017/02/01 23:01:51]

enterprise_enrollment_helper_mock.*, mock_enrollment_screen.* and
mock_base_screen_delegate.* are included for browser_tests in
chrome/test/BUILD.gn already.

If we want to share the code, we should create a build target to include them
instead of duplicating them.

I am thinking:
1. Add a "test_support" static lib in chrome/browser/chromeos/BUILD.gn
   similar to the "arc_test_support" target there to include those
   shared files.
2. Make browser_tests target in chrome/test/BUILD.gn depends on it,
   i.e. add //chrome/browser/chromeos:test_support to the deps;
3. Make unit_tests target in chrome/browser/chromeos/BUILD.gn also
   depends on it;

     "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/pin_storage_unittest.cc",
     "login/saml/saml_offline_signin_limiter_unittest.cc",
+    "login/screens/mock_base_screen_delegate.cc",
+    "login/screens/mock_base_screen_delegate.h",
     "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",
     "mobile_config_unittest.cc",
     "net/cert_verify_proc_chromeos_unittest.cc",
     "net/client_cert_store_chromeos_unittest.cc",
@@ skipping 152 matching lines @@
     "policy/proto/chrome_device_policy.proto",
     "policy/proto/install_attributes.proto",
   ]
 }
 
 proto_library("attestation_proto") {
   sources = [
     "attestation/attestation_key_payload.proto",
   ]
 }