Revert "Delete the ViewManager and WindowManager services."

services/view_manager/view_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_VIEW_MANAGER_VIEW_MANAGER_APP_H_
+#define SERVICES_VIEW_MANAGER_VIEW_MANAGER_APP_H_
+
+#include "base/memory/scoped_ptr.h"
+#include "mojo/common/tracing_impl.h"
+#include "mojo/public/cpp/application/application_delegate.h"
+#include "services/view_manager/view_manager_root_connection.h"
+
+namespace view_manager {
+
+class ViewManagerApp
+    : public mojo::ApplicationDelegate,
+      public ViewManagerRootConnection::ViewManagerRootConnectionObserver {
+ public:
+  ViewManagerApp();
+  ~ViewManagerApp() override;
+
+ private:
+  // ApplicationDelegate:
+  void Initialize(mojo::ApplicationImpl* app) override;
+  bool ConfigureIncomingConnection(
+      mojo::ApplicationConnection* connection) override;
+
+  // ViewManagerRootConnectionObserver:
+  void OnCloseViewManagerRootConnection(
+      ViewManagerRootConnection* view_manager_root_connection) override;
+
+  std::set<ViewManagerRootConnection*> active_root_connections_;
+  mojo::ApplicationImpl* app_impl_;
+  mojo::TracingImpl tracing_;
+
+  DISALLOW_COPY_AND_ASSIGN(ViewManagerApp);
+};
+
+}  // namespace view_manager
+
+#endif  // SERVICES_VIEW_MANAGER_VIEW_MANAGER_APP_H_