Added retry policy

chrome/test/BUILD.gn

Index: chrome/test/BUILD.gn
diff --git a/chrome/test/BUILD.gn b/chrome/test/BUILD.gn
index 4393b72a2f6fa22e9694e8d1052dd24c2fd6aa1c..71f2a2ad794031a66658a16e6839dcd9ae4c20f2 100644
--- a/chrome/test/BUILD.gn
+++ b/chrome/test/BUILD.gn
@@ -1235,6 +1235,7 @@ test("browser_tests") {
     ":repack_pseudo_locales",
     ":test_support",
     "//base",
+    "//chrome/browser/chromeos:test_support",
     "//components/spellcheck:build_features",
     "//components/sync:test_support_model",
     "//extensions/features",
@@ -2246,12 +2247,8 @@ test("browser_tests") {
         "../browser/chromeos/login/easy_unlock/bootstrap_browsertest.cc",
         "../browser/chromeos/login/enable_debugging_browsertest.cc",
         "../browser/chromeos/login/enrollment/enrollment_screen_browsertest.cc",
-        "../browser/chromeos/login/enrollment/enterprise_enrollment_helper_mock.cc",
-        "../browser/chromeos/login/enrollment/enterprise_enrollment_helper_mock.h",
         "../browser/chromeos/login/enrollment/mock_auto_enrollment_check_screen.cc",
         "../browser/chromeos/login/enrollment/mock_auto_enrollment_check_screen.h",
-        "../browser/chromeos/login/enrollment/mock_enrollment_screen.cc",
-        "../browser/chromeos/login/enrollment/mock_enrollment_screen.h",
         "../browser/chromeos/login/enterprise_enrollment_browsertest.cc",
         "../browser/chromeos/login/existing_user_controller_browsertest.cc",
         "../browser/chromeos/login/hid_detection_browsertest.cc",
@@ -2271,8 +2268,6 @@ test("browser_tests") {
         "../browser/chromeos/login/resource_loader_browsertest.cc",
         "../browser/chromeos/login/saml/saml_browsertest.cc",
         "../browser/chromeos/login/screens/hid_detection_screen_browsertest.cc",
-        "../browser/chromeos/login/screens/mock_base_screen_delegate.cc",
-        "../browser/chromeos/login/screens/mock_base_screen_delegate.h",
         "../browser/chromeos/login/screens/mock_enable_debugging_screen.cc",
         "../browser/chromeos/login/screens/mock_enable_debugging_screen.h",
         "../browser/chromeos/login/screens/mock_error_screen.cc",