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

chrome/browser/chromeos/login/existing_user_controller.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/login/existing_user_controller.h"
 
 #include <vector>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
@@ skipping 757 matching lines @@
   password_changed_ = login_performer_->password_changed();
 
   // LoginPerformer instance will delete itself once online auth result is OK.
   // In case of failure it'll bring up ScreenLock and ask for
   // correct password/display error message.
   // Even in case when following online,offline protocol and returning
   // requests_pending = false, let LoginPerformer delete itself.
   login_performer_->set_delegate(NULL);
   ignore_result(login_performer_.release());
 
-  // Update user's displayed email.
-  if (!display_email_.empty()) {
-    UserManager::Get()->SaveUserDisplayEmail(user_context.GetUserID(),
-                                             display_email_);
-    display_email_.clear();
-  }
-
   // Will call OnProfilePrepared() in the end.
   LoginUtils::Get()->PrepareProfile(user_context,
+                                    display_email_,
                                     has_cookies,
                                     false,          // Start session for user.
                                     this);
+
+  display_email_.clear();
 }
 
 void ExistingUserController::OnProfilePrepared(Profile* profile) {
   // Reenable clicking on other windows and status area.
   login_display_->SetUIEnabled(true);
 
   UserManager* user_manager = UserManager::Get();
   if (user_manager->IsCurrentUserNew() &&
       user_manager->IsLoggedInAsLocallyManagedUser()) {
     // Supervised users should launch into empty desktop on first run.
@@ skipping 317 matching lines @@
 }
 
 void ExistingUserController::SendAccessibilityAlert(
     const std::string& alert_text) {
   AccessibilityAlertInfo event(ProfileHelper::GetSigninProfile(), alert_text);
   SendControlAccessibilityNotification(
       ui::AX_EVENT_VALUE_CHANGED, &event);
 }
 
 }  // namespace chromeos