Revert of Start of display management for mus

ui/views/mus/screen_mus.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_VIEWS_MUS_SCREEN_MUS_H_
-#define UI_VIEWS_MUS_SCREEN_MUS_H_
-
-#include <vector>
-
-#include "base/observer_list.h"
-#include "components/mus/public/interfaces/display.mojom.h"
-#include "mojo/public/cpp/bindings/binding.h"
-#include "ui/gfx/display.h"
-#include "ui/gfx/screen.h"
-#include "ui/views/mus/mus_export.h"
-
-namespace mojo {
-class ApplicationImpl;
-}
-
-namespace views {
-
-// Screen implementation backed by mus::mojom::DisplayManager.
-class VIEWS_MUS_EXPORT ScreenMus
-    : public gfx::Screen,
-      public NON_EXPORTED_BASE(mus::mojom::DisplayManagerObserver) {
- public:
-  ScreenMus();
-  ~ScreenMus() override;
-
-  void Init(mojo::ApplicationImpl* app);
-
- private:
-  int FindDisplayIndexById(int64_t id) const;
-
-  // Invoked when a display changed in some weay, including being added.
-  // If |is_primary| is true, |changed_display| is the primary display.
-  void ProcessDisplayChanged(const gfx::Display& changed_display,
-                             bool is_primary);
-
-  // gfx::Screen:
-  gfx::Point GetCursorScreenPoint() override;
-  gfx::NativeWindow GetWindowUnderCursor() override;
-  gfx::NativeWindow GetWindowAtScreenPoint(const gfx::Point& point) override;
-  gfx::Display GetPrimaryDisplay() const override;
-  gfx::Display GetDisplayNearestWindow(gfx::NativeView view) const override;
-  gfx::Display GetDisplayNearestPoint(const gfx::Point& point) const override;
-  int GetNumDisplays() const override;
-  std::vector<gfx::Display> GetAllDisplays() const override;
-  gfx::Display GetDisplayMatching(const gfx::Rect& match_rect) const override;
-  void AddObserver(gfx::DisplayObserver* observer) override;
-  void RemoveObserver(gfx::DisplayObserver* observer) override;
-
-  // mus::mojom::DisplayManager:
-  void OnDisplays(mojo::Array<mus::mojom::DisplayPtr> displays) override;
-  void OnDisplaysChanged(mojo::Array<mus::mojom::DisplayPtr> display) override;
-  void OnDisplayRemoved(int64_t id) override;
-
-  mus::mojom::DisplayManagerPtr display_manager_;
-  std::vector<gfx::Display> displays_;
-  int primary_display_index_;
-  mojo::Binding<mus::mojom::DisplayManagerObserver>
-      display_manager_observer_binding_;
-  base::ObserverList<gfx::DisplayObserver> observers_;
-
-  DISALLOW_COPY_AND_ASSIGN(ScreenMus);
-};
-
-}  // namespace views
-
-#endif  // UI_VIEWS_MUS_SCREEN_MUS_H_