Mojo: Report bindings validation errors via MojoNotifyBadMessage

mojo/public/cpp/bindings/lib/associated_interface_ptr_state.h

Index: mojo/public/cpp/bindings/lib/associated_interface_ptr_state.h
diff --git a/mojo/public/cpp/bindings/lib/associated_interface_ptr_state.h b/mojo/public/cpp/bindings/lib/associated_interface_ptr_state.h
index e214335a9ea88049e3abacc7325c2745571dd291..6be03cb0c345954454550bc7816570ab57a44971 100644
--- a/mojo/public/cpp/bindings/lib/associated_interface_ptr_state.h
+++ b/mojo/public/cpp/bindings/lib/associated_interface_ptr_state.h
@@ -93,6 +93,7 @@ class AssociatedInterfacePtrState {
         info.PassHandle(), nullptr,
         base::WrapUnique(new typename Interface::ResponseValidator_()), false,
         std::move(runner)));
+    endpoint_client_->set_interface_name(Interface::Name_);
     proxy_.reset(new Proxy(endpoint_client_.get()));
     proxy_->serialization_context()->router = endpoint_client_->router();
   }