Revert "Delete the ViewManager and WindowManager services."

services/view_manager/view_manager_app.cc

+// 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.
+
+#include "services/view_manager/view_manager_app.h"
+
+#include "base/trace_event/trace_event.h"
+#include "mojo/application/application_runner_chromium.h"
+#include "mojo/common/tracing_impl.h"
+#include "mojo/public/c/system/main.h"
+#include "mojo/public/cpp/application/application_connection.h"
+#include "mojo/public/cpp/application/application_impl.h"
+#include "services/view_manager/view_manager_root_connection.h"
+
+using mojo::ApplicationConnection;
+using mojo::ApplicationImpl;
+using mojo::InterfaceRequest;
+using mojo::ViewManagerService;
+using mojo::WindowManagerInternalClient;
+
+namespace view_manager {
+
+ViewManagerApp::ViewManagerApp() : app_impl_(nullptr) {}
+
+ViewManagerApp::~ViewManagerApp() {}
+
+void ViewManagerApp::Initialize(ApplicationImpl* app) {
+  app_impl_ = app;
+  tracing_.Initialize(app);
+  TRACE_EVENT0("view_manager", __func__);
+}
+
+bool ViewManagerApp::ConfigureIncomingConnection(
+    ApplicationConnection* connection) {
+  TRACE_EVENT0("view_manager", __func__);
+  // We keep a raw pointer in active_root_connections_ in order to be able to
+  // close the ViewManagerApp when all outstanding ViewManagerRootConnections
+  // are closed. ViewManagerRootConnection manages its own lifetime.
+  ViewManagerRootConnection* root_connection =
+      new ViewManagerRootConnection(app_impl_, this);
+  if (root_connection->Init(connection)) {
+    active_root_connections_.insert(root_connection);
+    return true;
+  } else {
+    return false;
+  }
+}
+
+void ViewManagerApp::OnCloseViewManagerRootConnection(
+    ViewManagerRootConnection* view_manager_root_connection) {
+  active_root_connections_.erase(view_manager_root_connection);
+
+  if (active_root_connections_.size() == 0) {
+    ApplicationImpl::Terminate();
+  }
+}
+
+}  // namespace view_manager