Revert of Start session fail causes restart chrome

chrome/browser/chromeos/settings/device_settings_test_helper.h

 // 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.
 
 #ifndef CHROME_BROWSER_CHROMEOS_SETTINGS_DEVICE_SETTINGS_TEST_HELPER_H_
 #define CHROME_BROWSER_CHROMEOS_SETTINGS_DEVICE_SETTINGS_TEST_HELPER_H_
 
 #include <map>
 #include <string>
 #include <vector>
@@ skipping 70 matching lines @@
 
   // SessionManagerClient:
   virtual void Init(dbus::Bus* bus) OVERRIDE;
   virtual void SetStubDelegate(SessionManagerClient::StubDelegate* delegate)
       OVERRIDE;
   virtual void AddObserver(Observer* observer) OVERRIDE;
   virtual void RemoveObserver(Observer* observer) OVERRIDE;
   virtual bool HasObserver(Observer* observer) OVERRIDE;
   virtual void EmitLoginPromptVisible() OVERRIDE;
   virtual void RestartJob(int pid, const std::string& command_line) OVERRIDE;
-  virtual void StartSession(const std::string& user_email,
-                            const StartSessionCallback& callback) OVERRIDE;
+  virtual void StartSession(const std::string& user_email) OVERRIDE;
   virtual void StopSession() OVERRIDE;
   virtual void StartDeviceWipe() OVERRIDE;
   virtual void RequestLockScreen() OVERRIDE;
   virtual void NotifyLockScreenShown() OVERRIDE;
   virtual void NotifyLockScreenDismissed() OVERRIDE;
   virtual void RetrieveActiveSessions(
       const ActiveSessionsCallback& callback) OVERRIDE;
   virtual void RetrieveDevicePolicy(
       const RetrievePolicyCallback& callback) OVERRIDE;
   virtual void RetrievePolicyForUser(
@@ skipping 83 matching lines @@
 
   chromeos::FakeDBusThreadManager* fake_dbus_thread_manager_;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(DeviceSettingsTestBase);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_SETTINGS_DEVICE_SETTINGS_TEST_HELPER_H_