| Index: src/interface-descriptors.cc | 
| diff --git a/src/interface-descriptors.cc b/src/interface-descriptors.cc | 
| index 7bceaf2182b56921181eab67acd25b19f14c7c16..121872e4a497b0f21e9c84563f6a111c6408cd0b 100644 | 
| --- a/src/interface-descriptors.cc | 
| +++ b/src/interface-descriptors.cc | 
| @@ -79,6 +79,12 @@ void VoidDescriptor::InitializePlatformSpecific( | 
| data->InitializePlatformSpecific(0, nullptr); | 
| } | 
|  | 
| +void FastNewFunctionContextDescriptor::InitializePlatformSpecific( | 
| +    CallInterfaceDescriptorData* data) { | 
| +  Register registers[] = {FunctionRegister(), SlotsRegister()}; | 
| +  data->InitializePlatformSpecific(arraysize(registers), registers); | 
| +} | 
| + | 
| FunctionType* LoadDescriptor::BuildCallInterfaceDescriptorFunctionType( | 
| Isolate* isolate, int parameter_count) { | 
| Zone* zone = isolate->interface_descriptor_zone(); | 
|  |