Mojo C++ bindings: sync call support for associated interfaces and master interfaces

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

Index: mojo/public/cpp/bindings/lib/interface_ptr_state.h
diff --git a/mojo/public/cpp/bindings/lib/interface_ptr_state.h b/mojo/public/cpp/bindings/lib/interface_ptr_state.h
index d772e21ac03a8a8c7f09a18ce2f34c0cc42a9067..3f7d938e2dd1913c687285521890682a85ad3f0e 100644
--- a/mojo/public/cpp/bindings/lib/interface_ptr_state.h
+++ b/mojo/public/cpp/bindings/lib/interface_ptr_state.h
@@ -316,7 +316,7 @@ class InterfacePtrState<Interface, true> {
     router_ = new MultiplexRouter(true, std::move(handle_));
     endpoint_client_.reset(new InterfaceEndpointClient(
         router_->CreateLocalEndpointHandle(kMasterInterfaceId), nullptr,
-        make_scoped_ptr(new typename Interface::ResponseValidator_())));
+        make_scoped_ptr(new typename Interface::ResponseValidator_()), false));
     proxy_.reset(new Proxy(endpoint_client_.get()));
     proxy_->serialization_context()->router = endpoint_client_->router();
   }