Moves mash/wm into ash/mus

mash/wm/test/wm_test_screen.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 MASH_WM_WM_TEST_SCREEN_H_
-#define MASH_WM_WM_TEST_SCREEN_H_
-
-#include "ui/display/screen.h"
-#include "ui/views/mus/display_list.h"
-
-namespace mash {
-namespace wm {
-
-// Screen implementation used by tests for the windowmanager. Does not talk
-// to mus. Tests must keep the list of Displays in sync manually.
-class WmTestScreen : public display::Screen {
- public:
-  WmTestScreen();
-  ~WmTestScreen() override;
-
-  const views::DisplayList& display_list() const { return display_list_; }
-  views::DisplayList* display_list() { return &display_list_; }
-
- private:
-  // display::Screen:
-  gfx::Point GetCursorScreenPoint() override;
-  bool IsWindowUnderCursor(gfx::NativeWindow window) override;
-  gfx::NativeWindow GetWindowAtScreenPoint(const gfx::Point& point) override;
-  display::Display GetPrimaryDisplay() const override;
-  display::Display GetDisplayNearestWindow(gfx::NativeView view) const override;
-  display::Display GetDisplayNearestPoint(
-      const gfx::Point& point) const override;
-  int GetNumDisplays() const override;
-  std::vector<display::Display> GetAllDisplays() const override;
-  display::Display GetDisplayMatching(
-      const gfx::Rect& match_rect) const override;
-  void AddObserver(display::DisplayObserver* observer) override;
-  void RemoveObserver(display::DisplayObserver* observer) override;
-
-  views::DisplayList display_list_;
-
-  DISALLOW_COPY_AND_ASSIGN(WmTestScreen);
-};
-
-}  // namespace wm
-}  // namespace mash
-
-#endif  // MASH_WM_WM_TEST_SCREEN_H_