Revert "Delete the ViewManager and WindowManager services."

mojo/services/view_manager/cpp/view_manager_delegate.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 MOJO_SERVICES_VIEW_MANAGER_CPP_VIEW_MANAGER_DELEGATE_H_
+#define MOJO_SERVICES_VIEW_MANAGER_CPP_VIEW_MANAGER_DELEGATE_H_
+
+#include <string>
+
+#include "mojo/public/interfaces/application/service_provider.mojom.h"
+
+namespace mojo {
+
+class View;
+class ViewManager;
+
+// Interface implemented by an application using the view manager.
+class ViewManagerDelegate {
+ public:
+  // Called when the application implementing this interface is embedded at
+  // |root|. Every embed results in a new ViewManager and root View being
+  // created. |root| and it's corresponding ViewManager are valid until
+  // OnViewManagerDisconnected() is called with the same object.
+  //
+  // |services| exposes the services offered by the embedder to the delegate.
+  //
+  // |exposed_services| is an object that the delegate can add services to
+  // expose to the embedder.
+  //
+  // Note that if a different application is subsequently embedded at |root|,
+  // the pipes connecting |services| and |exposed_services| to the embedder and
+  // any services obtained from them are not broken and will continue to be
+  // valid.
+  virtual void OnEmbed(View* root,
+                       InterfaceRequest<ServiceProvider> services,
+                       ServiceProviderPtr exposed_services) = 0;
+
+  // Called when a connection to the view manager service is closed.
+  // |view_manager| is not valid after this function returns.
+  virtual void OnViewManagerDisconnected(ViewManager* view_manager) = 0;
+
+  // Asks the delegate to perform the specified action.
+  // TODO(sky): nuke! See comments in view_manager.mojom for details.
+  virtual bool OnPerformAction(View* view, const std::string& action);
+
+ protected:
+  virtual ~ViewManagerDelegate() {}
+};
+
+}  // namespace mojo
+
+#endif  // MOJO_SERVICES_VIEW_MANAGER_CPP_VIEW_MANAGER_DELEGATE_H_