Changes how window manager obtains WindowTree from mus

components/mus/ws/window_manager_factory_registry.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 COMPONENTS_MUS_WS_WINDOW_MANAGER_FACTORY_REGISTRY_H_
-#define COMPONENTS_MUS_WS_WINDOW_MANAGER_FACTORY_REGISTRY_H_
-
-#include <stdint.h>
-
-#include <memory>
-#include <vector>
-
-#include "base/macros.h"
-#include "base/observer_list.h"
-#include "components/mus/public/interfaces/window_manager_factory.mojom.h"
-#include "components/mus/ws/user_id_tracker_observer.h"
-
-namespace mus {
-namespace ws {
-
-class UserIdTracker;
-class WindowManagerFactoryRegistryObserver;
-class WindowManagerFactoryService;
-class WindowServer;
-
-namespace test {
-class WindowManagerFactoryRegistryTestApi;
-}
-
-// WindowManagerFactoryRegistry tracks the set of registered
-// WindowManagerFactoryServices.
-class WindowManagerFactoryRegistry : public UserIdTrackerObserver {
- public:
-  WindowManagerFactoryRegistry(WindowServer* window_server,
-                               UserIdTracker* tracker);
-  ~WindowManagerFactoryRegistry() override;
-
-  void Register(
-      const UserId& user_id,
-      mojo::InterfaceRequest<mojom::WindowManagerFactoryService> request);
-
-  std::vector<WindowManagerFactoryService*> GetServices();
-
-  void AddObserver(WindowManagerFactoryRegistryObserver* observer);
-  void RemoveObserver(WindowManagerFactoryRegistryObserver* observer);
-
- private:
-  friend class WindowManagerFactoryService;
-  friend class test::WindowManagerFactoryRegistryTestApi;
-
-  void AddServiceImpl(std::unique_ptr<WindowManagerFactoryService> service);
-
-  bool ContainsServiceForUser(const UserId& user_id) const;
-  void OnWindowManagerFactoryConnectionLost(
-      WindowManagerFactoryService* service);
-  void OnWindowManagerFactorySet(WindowManagerFactoryService* service);
-
-  // UserIdTrackerObserver:
-  void OnActiveUserIdChanged(const UserId& previously_active_id,
-                             const UserId& active_id) override;
-  void OnUserIdAdded(const UserId& id) override;
-  void OnUserIdRemoved(const UserId& id) override;
-
-  // Set to true the first time a valid factory has been found.
-  bool got_valid_factory_ = false;
-  UserIdTracker* id_tracker_;
-  WindowServer* window_server_;
-
-  std::vector<std::unique_ptr<WindowManagerFactoryService>> services_;
-
-  base::ObserverList<WindowManagerFactoryRegistryObserver> observers_;
-
-  DISALLOW_COPY_AND_ASSIGN(WindowManagerFactoryRegistry);
-};
-
-}  // namespace ws
-}  // namespace mus
-
-#endif  // COMPONENTS_MUS_WS_WINDOW_MANAGER_FACTORY_REGISTRY_H_