Revert of Introduce SessionManager that will contain code to start user session on Chrome OS

chrome/browser/chromeos/app_mode/kiosk_profile_loader.cc

 // Copyright 2013 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/app_mode/kiosk_profile_loader.h"
 
 #include "base/logging.h"
 #include "base/memory/weak_ptr.h"
 #include "base/message_loop/message_loop.h"
 #include "base/strings/string_util.h"
@@ skipping 142 matching lines @@
 
   // If we are launching a demo session, we need to start MountGuest with the
   // guest username; this is because there are several places in the cros code
   // which rely on the username sent to cryptohome to be $guest. Back in Chrome
   // we switch this back to the demo user name to correctly identify this
   // user as a demo user.
   UserContext context = user_context;
   if (context.GetUserID() == UserManager::kGuestUserName)
     context.SetUserID(DemoAppLauncher::kDemoUserName);
   LoginUtils::Get()->PrepareProfile(context,
+                                    std::string(),  // display email
                                     false,  // has_cookies
                                     false,  // has_active_session
                                     this);
 }
 
 void KioskProfileLoader::OnLoginFailure(const LoginFailure& error) {
   ReportLaunchResult(LoginFailureToKioskAppLaunchError(error));
 }
 
 void KioskProfileLoader::WhiteListCheckFailed(const std::string& email) {
@@ skipping 12 matching lines @@
 void KioskProfileLoader::OnProfilePrepared(Profile* profile) {
   // This object could be deleted any time after successfully reporting
   // a profile load, so invalidate the LoginUtils delegate now.
   LoginUtils::Get()->DelegateDeleted(this);
 
   delegate_->OnProfileLoaded(profile);
   ReportLaunchResult(KioskAppLaunchError::NONE);
 }
 
 }  // namespace chromeos