Revert "Delete the ViewManager and WindowManager services."

mojo/services/view_manager/cpp/lib/view_manager_context.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 "view_manager/cpp/view_manager_context.h"
+
+#include "mojo/public/cpp/application/application_impl.h"
+#include "mojo/public/cpp/bindings/interface_request.h"
+#include "window_manager/interfaces/window_manager.mojom.h"
+
+namespace mojo {
+class ApplicationImpl;
+
+class ViewManagerContext::InternalState {
+ public:
+  explicit InternalState(ApplicationImpl* application_impl) {
+    application_impl->ConnectToService("mojo:window_manager", &wm_);
+  }
+  ~InternalState() {}
+
+  WindowManager* wm() { return wm_.get(); }
+
+ private:
+  WindowManagerPtr wm_;
+
+  MOJO_DISALLOW_COPY_AND_ASSIGN(InternalState);
+};
+
+ViewManagerContext::ViewManagerContext(ApplicationImpl* application_impl)
+    : state_(new InternalState(application_impl)) {}
+ViewManagerContext::~ViewManagerContext() {
+  delete state_;
+}
+
+void ViewManagerContext::Embed(const String& url) {
+  Embed(url, nullptr, nullptr);
+}
+
+void ViewManagerContext::Embed(const String& url,
+                               InterfaceRequest<ServiceProvider> services,
+                               ServiceProviderPtr exposed_services) {
+  state_->wm()->Embed(url, services.Pass(), exposed_services.Pass());
+}
+
+}  // namespace mojo