PPC/s390: Make FastNewFunctionContextStub take slots parameter

src/s390/interface-descriptors-s390.cc

Index: src/s390/interface-descriptors-s390.cc
diff --git a/src/s390/interface-descriptors-s390.cc b/src/s390/interface-descriptors-s390.cc
index d529d076876e3e08f075ae4f415b571293a27816..a7efd7a0dda63d6088ceefd0a42b2b2ce646f771 100644
--- a/src/s390/interface-descriptors-s390.cc
+++ b/src/s390/interface-descriptors-s390.cc
@@ -20,6 +20,11 @@ void CallInterfaceDescriptor::DefaultInitializePlatformSpecific(
                                    default_stub_registers);
 }
 
+const Register FastNewFunctionContextDescriptor::FunctionRegister() {
+  return r3;
+}
+const Register FastNewFunctionContextDescriptor::SlotsRegister() { return r2; }
+
 const Register LoadDescriptor::ReceiverRegister() { return r3; }
 const Register LoadDescriptor::NameRegister() { return r4; }
 const Register LoadDescriptor::SlotRegister() { return r2; }
@@ -63,12 +68,6 @@ void FastNewClosureDescriptor::InitializePlatformSpecific(
   data->InitializePlatformSpecific(arraysize(registers), registers);
 }
 
-void FastNewFunctionContextDescriptor::InitializePlatformSpecific(
-    CallInterfaceDescriptorData* data) {
-  Register registers[] = {r3};
-  data->InitializePlatformSpecific(arraysize(registers), registers);
-}
-
 void FastNewObjectDescriptor::InitializePlatformSpecific(
     CallInterfaceDescriptorData* data) {
   Register registers[] = {r3, r5};