Make Mandoline shut down cleanly.

components/view_manager/public/cpp/view_manager_init.h

Index: components/view_manager/public/cpp/view_manager_init.h
diff --git a/components/view_manager/public/cpp/view_manager_init.h b/components/view_manager/public/cpp/view_manager_init.h
index 2fcd74f027a5e3f424edc13ae1467e71add22048..40b7339e825c303b1d168c2ec4559a2821c69097 100644
--- a/components/view_manager/public/cpp/view_manager_init.h
+++ b/components/view_manager/public/cpp/view_manager_init.h
@@ -10,6 +10,8 @@
 #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;
@@ -18,13 +20,13 @@ 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.
@@ -35,6 +37,9 @@ class ViewManagerInit {
 
   void OnCreate(InterfaceRequest<ViewManagerClient> request);
 
+  // ErrorHandler:
+  void OnConnectionError() override;
+
   ApplicationImpl* app_;
   ViewManagerDelegate* delegate_;
   scoped_ptr<ClientFactory> client_factory_;