Have OobeUI handle display observation

chrome/browser/chromeos/login/ui/login_display_host_impl.h

 // 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.
 
 #ifndef CHROME_BROWSER_CHROMEOS_LOGIN_UI_LOGIN_DISPLAY_HOST_IMPL_H_
 #define CHROME_BROWSER_CHROMEOS_LOGIN_UI_LOGIN_DISPLAY_HOST_IMPL_H_
 
 #include <stdint.h>
 
 #include <memory>
 #include <string>
 #include <vector>
 
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
 #include "chrome/browser/chromeos/login/app_launch_controller.h"
 #include "chrome/browser/chromeos/login/auth/auth_prewarmer.h"
 #include "chrome/browser/chromeos/login/existing_user_controller.h"
 #include "chrome/browser/chromeos/login/signin_screen_controller.h"
 #include "chrome/browser/chromeos/login/ui/login_display.h"
 #include "chrome/browser/chromeos/login/ui/login_display_host.h"
 #include "chrome/browser/chromeos/login/wizard_controller.h"
 #include "chrome/browser/chromeos/settings/device_settings_service.h"
 #include "chrome/browser/ui/ash/multi_user/multi_user_window_manager.h"
 #include "chromeos/audio/cras_audio_handler.h"
 #include "chromeos/dbus/session_manager_client.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
 #include "content/public/browser/web_contents_observer.h"
-#include "ui/display/display_observer.h"
 #include "ui/gfx/geometry/rect.h"
 #include "ui/views/widget/widget_removals_observer.h"
 #include "ui/wm/public/scoped_drag_drop_disabler.h"
 
 class AccountId;
 class ScopedKeepAlive;
 
 namespace chromeos {
 
 class ArcKioskController;
 class DemoAppLauncher;
 class FocusRingController;
 class WebUILoginDisplay;
 class WebUILoginView;
 
 // An implementation class for OOBE/login WebUI screen host.
 // It encapsulates controllers, wallpaper integration and flow.
 class LoginDisplayHostImpl : public LoginDisplayHost,
                              public content::NotificationObserver,
                              public content::WebContentsObserver,
                              public chromeos::SessionManagerClient::Observer,
                              public chromeos::CrasAudioHandler::AudioObserver,
-                             public display::DisplayObserver,
                              public views::WidgetRemovalsObserver,
                              public chrome::MultiUserWindowManager::Observer {
  public:
   explicit LoginDisplayHostImpl(const gfx::Rect& wallpaper_bounds);
   ~LoginDisplayHostImpl() override;
 
   // LoginDisplayHost implementation:
   LoginDisplay* CreateLoginDisplay(LoginDisplay::Delegate* delegate) override;
   gfx::NativeWindow GetNativeWindow() const override;
   OobeUI* GetOobeUI() const override;
@@ skipping 44 matching lines @@
 
   // Overridden from content::WebContentsObserver:
   void RenderProcessGone(base::TerminationStatus status) override;
 
   // Overridden from chromeos::SessionManagerClient::Observer:
   void EmitLoginPromptVisibleCalled() override;
 
   // Overridden from chromeos::CrasAudioHandler::AudioObserver:
   void OnActiveOutputNodeChanged() override;
 
-  // Overridden from display::DisplayObserver:
-  void OnDisplayAdded(const display::Display& new_display) override;
-  void OnDisplayRemoved(const display::Display& old_display) override;
-  void OnDisplayMetricsChanged(const display::Display& display,
-                               uint32_t changed_metrics) override;
-
   // Overriden from views::WidgetRemovalsObserver:
   void OnWillRemoveView(views::Widget* widget, views::View* view) override;
 
   // Overriden from chrome::MultiUserWindowManager::Observer:
   void OnUserSwitchAnimationFinished() override;
 
  private:
   class LoginWidgetDelegate;
 
   // Way to restore if renderer have crashed.
@@ skipping 172 matching lines @@
 
   base::WeakPtrFactory<LoginDisplayHostImpl> pointer_factory_;
   base::WeakPtrFactory<LoginDisplayHostImpl> animation_weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(LoginDisplayHostImpl);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_LOGIN_UI_LOGIN_DISPLAY_HOST_IMPL_H_