Mandoline: ConnectToApplication and ConnectToService should fail gracefully

mojo/application/public/cpp/application_impl.h

Index: mojo/application/public/cpp/application_impl.h
diff --git a/mojo/application/public/cpp/application_impl.h b/mojo/application/public/cpp/application_impl.h
index 8ab9aba4525b8210892715c75cb0ea99f56d4f5e..20b073359191a81e8cc5e047ab4c094ba832f5ff 100644
--- a/mojo/application/public/cpp/application_impl.h
+++ b/mojo/application/public/cpp/application_impl.h
@@ -92,7 +92,10 @@ class ApplicationImpl : public Application,
   template <typename Interface>
   void ConnectToService(mojo::URLRequestPtr request,
                         InterfacePtr<Interface>* ptr) {
-    ConnectToApplication(request.Pass())->ConnectToService(ptr);
+    ApplicationConnection* connection = ConnectToApplication(request.Pass());
+    if (!connection)
+      return;
+    connection->ConnectToService(ptr);
   }
 
   // Application implementation.