Revert "Delete the ViewManager and WindowManager services."

services/window_manager/window_manager_app.h

+// Copyright 2014 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 SERVICES_WINDOW_MANAGER_WINDOW_MANAGER_APP_H_
+#define SERVICES_WINDOW_MANAGER_WINDOW_MANAGER_APP_H_
+
+#include "base/macros.h"
+#include "mojo/public/cpp/application/application_connection.h"
+#include "mojo/public/cpp/application/application_delegate.h"
+#include "mojo/public/cpp/application/application_impl.h"
+#include "mojo/services/window_manager/interfaces/window_manager.mojom.h"
+#include "services/window_manager/window_manager_delegate.h"
+
+namespace window_manager {
+
+// Implements core window manager functionality that could conceivably be shared
+// across multiple window managers implementing superficially different user
+// experiences.
+// A window manager wishing to use this core should create and own an instance
+// of this object. They may implement the associated ViewManager/WindowManager
+// delegate interfaces exposed by the view manager, this object provides the
+// canonical implementation of said interfaces but will call out to the wrapped
+// instances.
+// Window manager clients should request a WindowManager service to get a new
+// native window.
+class WindowManagerApp : public mojo::ApplicationDelegate,
+                         public mojo::InterfaceFactory<mojo::WindowManager> {
+ public:
+  WindowManagerApp(WindowManagerControllerFactory* controller_factory);
+  ~WindowManagerApp() override;
+
+  // Overridden from ApplicationDelegate:
+  void Initialize(mojo::ApplicationImpl* impl) override;
+  bool ConfigureIncomingConnection(
+      mojo::ApplicationConnection* connection) override;
+
+ private:
+  // InterfaceFactory<WindowManager>:
+  void Create(mojo::ApplicationConnection* connection,
+              mojo::InterfaceRequest<mojo::WindowManager> request) override;
+
+  mojo::ApplicationImpl* app_impl_;
+  WindowManagerControllerFactory* controller_factory_;
+
+  DISALLOW_COPY_AND_ASSIGN(WindowManagerApp);
+};
+
+}  // namespace window_manager
+
+#endif  // SERVICES_WINDOW_MANAGER_WINDOW_MANAGER_APP_H_