Revert 170507 - Add public accounts to UserManager

chrome/browser/chromeos/chrome_browser_main_chromeos.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/chrome_browser_main_chromeos.h"
 
 #include <string>
 #include <vector>
 
 #include "ash/shell.h"
@@ skipping 635 matching lines @@
   video_activity_notifier_.reset();
   primary_display_switch_observer_.reset();
 
   // Detach D-Bus clients before DBusThreadManager is shut down.
   power_button_observer_.reset();
   screen_dimming_observer_.reset();
 
   // Delete ContactManager while |g_browser_process| is still alive.
   contact_manager_.reset();
 
-  // Let the UserManager unregister itself as an observer of the CrosSettings
-  // singleton before it is destroyed.
-  UserManager::Get()->Shutdown();
-
   ChromeBrowserMainPartsLinux::PostMainMessageLoopRun();
 }
 
 void ChromeBrowserMainPartsChromeos::SetupPlatformFieldTrials() {
   SetupLowMemoryHeadroomFieldTrial();
 }
 
 void ChromeBrowserMainPartsChromeos::SetupLowMemoryHeadroomFieldTrial() {
   chrome::VersionInfo::Channel channel = chrome::VersionInfo::GetChannel();
   // Only enable this experiment on Canary and Dev, since it's possible
@@ skipping 34 matching lines @@
     } else if (trial->group() == margin_200mb) {
       LOG(WARNING) << "low_mem: Part of '200MB' experiment";
       LowMemoryObserver::SetLowMemoryMargin(200);
     } else {
       LOG(WARNING) << "low_mem: Part of 'default' experiment";
     }
   }
 }
 
 }  //  namespace chromeos