Break circular dependency between InitializeDeviceDisablingManager and DeviceDisabledScreen

chrome/browser/chromeos/login/screens/device_disabled_screen.cc

 // Copyright 2014 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/screens/device_disabled_screen.h"
 
 #include <string>
 
 #include "base/logging.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/browser_process_platform_part.h"
 #include "chrome/browser/chromeos/login/wizard_controller.h"
 
 namespace chromeos {
 
 DeviceDisabledScreen::DeviceDisabledScreen(
     BaseScreenDelegate* base_screen_delegate,
     DeviceDisabledScreenView* view)
     : BaseScreen(base_screen_delegate, OobeScreen::SCREEN_DEVICE_DISABLED),
       view_(view),
       device_disabling_manager_(
           g_browser_process->platform_part()->device_disabling_manager()),
       showing_(false) {
-  DCHECK(view_);
-  if (view_)
-    view_->SetDelegate(this);
+  view_->SetDelegate(this);
   device_disabling_manager_->AddObserver(this);
 }
 
 DeviceDisabledScreen::~DeviceDisabledScreen() {
   if (view_)
     view_->SetDelegate(nullptr);
   device_disabling_manager_->RemoveObserver(this);
 }
 
 void DeviceDisabledScreen::Show() {
@@ skipping 26 matching lines @@
   return device_disabling_manager_->disabled_message();
 }
 
 void DeviceDisabledScreen::OnDisabledMessageChanged(
     const std::string& disabled_message) {
   if (view_)
     view_->UpdateMessage(disabled_message);
 }
 
 }  // namespace chromeos