Revert of Start session fail causes restart chrome

chrome/browser/chromeos/settings/device_settings_test_helper.cc

 // 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.
 
 #include "chrome/browser/chromeos/settings/device_settings_test_helper.h"
 
 #include "base/message_loop/message_loop.h"
 #include "base/run_loop.h"
 #include "base/threading/sequenced_worker_pool.h"
 #include "chrome/browser/chromeos/policy/proto/chrome_device_policy.pb.h"
@@ skipping 98 matching lines @@
 
 bool DeviceSettingsTestHelper::HasObserver(Observer* observer) {
   return false;
 }
 
 void DeviceSettingsTestHelper::EmitLoginPromptVisible() {}
 
 void DeviceSettingsTestHelper::RestartJob(int pid,
                                           const std::string& command_line) {}
 
-void DeviceSettingsTestHelper::StartSession(
-    const std::string& user_email,
-    const StartSessionCallback& callback) {
-}
+void DeviceSettingsTestHelper::StartSession(const std::string& user_email) {}
 
 void DeviceSettingsTestHelper::StopSession() {}
 
 void DeviceSettingsTestHelper::StartDeviceWipe() {}
 
 void DeviceSettingsTestHelper::RequestLockScreen() {}
 
 void DeviceSettingsTestHelper::NotifyLockScreenShown() {}
 
 void DeviceSettingsTestHelper::NotifyLockScreenDismissed() {}
@@ skipping 105 matching lines @@
 void DeviceSettingsTestBase::FlushDeviceSettings() {
   device_settings_test_helper_.Flush();
 }
 
 void DeviceSettingsTestBase::ReloadDeviceSettings() {
   device_settings_service_.OwnerKeySet(true);
   FlushDeviceSettings();
 }
 
 }  // namespace chromeos