Moves mash/wm into ash/mus

mash/wm/layout_manager.h

-// Copyright 2015 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_LAYOUT_MANAGER_H_
-#define MASH_WM_LAYOUT_MANAGER_H_
-
-#include <stdint.h>
-
-#include "base/macros.h"
-#include "components/mus/public/cpp/window_observer.h"
-
-namespace mash {
-namespace wm {
-
-// Base class for container layout managers. Derived classes override
-// LayoutWindow() to perform layout and register properties to which
-// changes trigger layout.
-// LayoutManagers observe both the bound container and all its children.
-// They must be attached prior to any windows being added to the
-// container.
-class LayoutManager : public mus::WindowObserver {
- public:
-  ~LayoutManager() override;
-
- protected:
-  explicit LayoutManager(mus::Window* owner);
-
-  void Uninstall();
-
-  // Overridden from mus::WindowObserver:
-  void OnTreeChanged(
-      const mus::WindowObserver::TreeChangeParams& params) override;
-  void OnWindowDestroying(mus::Window* window) override;
-  void OnWindowBoundsChanged(mus::Window* window,
-                             const gfx::Rect& old_bounds,
-                             const gfx::Rect& new_bounds) override;
-  void OnWindowSharedPropertyChanged(
-      mus::Window* window,
-      const std::string& name,
-      const std::vector<uint8_t>* old_data,
-      const std::vector<uint8_t>* new_data) override;
-
-  virtual void WindowAdded(mus::Window* window);
-  virtual void WindowRemoved(mus::Window* window);
-  virtual void LayoutWindow(mus::Window* window) = 0;
-
-  // Add a property that triggers layout when changed.
-  void AddLayoutProperty(const std::string& property);
-
-  mus::Window* owner() { return owner_; }
-
- private:
-  mus::Window* owner_;
-
-  std::set<std::string> layout_properties_;
-
-  DISALLOW_COPY_AND_ASSIGN(LayoutManager);
-};
-
-}  // namespace wm
-}  // namespace mash
-
-#endif  // MASH_WM_LAYOUT_MANAGER_H_