Add FakeDisplayDelegate for off device usage.

ui/ozone/platform/x11/native_display_delegate_ozone_x11.h

-// Copyright 2016 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 UI_OZONE_PLATFORM_X11_NATIVE_DISPLAY_DELEGATE_OZONE_X11_H_
-#define UI_OZONE_PLATFORM_X11_NATIVE_DISPLAY_DELEGATE_OZONE_X11_H_
-
-#include <memory>
-#include <vector>
-
-#include "base/macros.h"
-#include "base/observer_list.h"
-#include "ui/display/types/native_display_delegate.h"
-#include "ui/ozone/common/native_display_delegate_ozone.h"
-
-namespace ui {
-
-class NativeDisplayDelegateOzoneX11 : public NativeDisplayDelegateOzone {
- public:
-  NativeDisplayDelegateOzoneX11();
-  ~NativeDisplayDelegateOzoneX11() override;
-
-  void OnConfigurationChanged();
-
-  // NativeDisplayDelegateOzone overrides:
-  void Initialize() override;
-  void AddObserver(NativeDisplayObserver* observer) override;
-  void RemoveObserver(NativeDisplayObserver* observer) override;
-
- private:
-  base::ObserverList<NativeDisplayObserver> observers_;
-
-  DISALLOW_COPY_AND_ASSIGN(NativeDisplayDelegateOzoneX11);
-};
-
-}  // namespace ui
-
-#endif  // UI_OZONE_PLATFORM_X11_NATIVE_DISPLAY_DELEGATE_OZONE_X11_H_