Make Mandoline shut down cleanly.

components/view_manager/public/cpp/view_manager_init.h

 // Copyright 2015 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 COMPONENTS_VIEW_MANAGER_PUBLIC_CPP_VIEW_MANAGER_INIT_H_
 #define COMPONENTS_VIEW_MANAGER_PUBLIC_CPP_VIEW_MANAGER_INIT_H_
 
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
 #include "components/view_manager/public/interfaces/view_manager.mojom.h"
 #include "components/view_manager/public/interfaces/view_manager_root.mojom.h"
 #include "third_party/mojo/src/mojo/public/cpp/bindings/binding.h"
+#include "third_party/mojo/src/mojo/public/cpp/bindings/error_handler.h"
+
 namespace mojo {
 
 class ApplicationImpl;
 class ViewManagerDelegate;
 
 // ViewManagerInit is used to establish the initial connection to the
 // ViewManager. Use it when you know the ViewManager is not running and you're
 // app is going to be the first one to contact it.
-class ViewManagerInit {
+class ViewManagerInit : public mojo::ErrorHandler {
  public:
   // |root_client| is optional.
   ViewManagerInit(ApplicationImpl* app,
                   ViewManagerDelegate* delegate,
                   ViewManagerRootClient* root_client);
-  ~ViewManagerInit();
+  ~ViewManagerInit() override;
 
   // Returns the ViewManagerRoot. This is only valid if |root_client| was
   // supplied to the constructor.
   ViewManagerRoot* view_manager_root() { return view_manager_root_.get(); }
 
  private:
   class ClientFactory;
 
   void OnCreate(InterfaceRequest<ViewManagerClient> request);
 
+  // ErrorHandler:
+  void OnConnectionError() override;
+
   ApplicationImpl* app_;
   ViewManagerDelegate* delegate_;
   scoped_ptr<ClientFactory> client_factory_;
   ViewManagerServicePtr service_;
   ViewManagerRootPtr view_manager_root_;
   scoped_ptr<Binding<ViewManagerRootClient>> root_client_binding_;
 
   DISALLOW_COPY_AND_ASSIGN(ViewManagerInit);
 };
 
 }  // namespace mojo
 
 #endif  // COMPONENTS_VIEW_MANAGER_PUBLIC_CPP_VIEW_MANAGER_INIT_H_