Do not restart Chrome to apply user flags with stub session manager

chrome/browser/chromeos/settings/device_settings_test_helper.cc

Index: chrome/browser/chromeos/settings/device_settings_test_helper.cc
diff --git a/chrome/browser/chromeos/settings/device_settings_test_helper.cc b/chrome/browser/chromeos/settings/device_settings_test_helper.cc
index 234a837c6d5676f6d54e9476b39619b2dece2fb7..2e86f861cbf77efc08290be48d89e02120fbf12e 100644
--- a/chrome/browser/chromeos/settings/device_settings_test_helper.cc
+++ b/chrome/browser/chromeos/settings/device_settings_test_helper.cc
@@ -175,6 +175,10 @@ void DeviceSettingsTestHelper::StoreDeviceLocalAccountPolicy(
   device_local_account_policy_[account_id].store_callbacks_.push_back(callback);
 }
 
+bool DeviceSettingsTestHelper::SupportsRestartToApplyUserFlags() const {
+  return false;
+}
+
 void DeviceSettingsTestHelper::SetFlagsForUser(
     const cryptohome::Identification& cryptohome_id,
     const std::vector<std::string>& flags) {}