Make FastNewFunctionContextStub take slots parameter

src/ia32/interface-descriptors-ia32.cc

Index: src/ia32/interface-descriptors-ia32.cc
diff --git a/src/ia32/interface-descriptors-ia32.cc b/src/ia32/interface-descriptors-ia32.cc
index d22a2c1d9495ac3e19ec9ed6336a79c7fe667452..fc5e461595c001c133a9e92bef96c5d7fd20d9ab 100644
--- a/src/ia32/interface-descriptors-ia32.cc
+++ b/src/ia32/interface-descriptors-ia32.cc
@@ -20,6 +20,11 @@ void CallInterfaceDescriptor::DefaultInitializePlatformSpecific(
                                    default_stub_registers);
 }
 
+const Register FastNewFunctionContextDescriptor::FunctionRegister() {
+  return edi;
+}
+const Register FastNewFunctionContextDescriptor::SlotsRegister() { return eax; }
+
 const Register LoadDescriptor::ReceiverRegister() { return edx; }
 const Register LoadDescriptor::NameRegister() { return ecx; }
 const Register LoadDescriptor::SlotRegister() { return eax; }
@@ -76,12 +81,6 @@ void FastNewClosureDescriptor::InitializePlatformSpecific(
   data->InitializePlatformSpecific(arraysize(registers), registers, NULL);
 }
 
-void FastNewFunctionContextDescriptor::InitializePlatformSpecific(
-    CallInterfaceDescriptorData* data) {
-  Register registers[] = {edi};
-  data->InitializePlatformSpecific(arraysize(registers), registers, NULL);
-}
-
 void FastNewObjectDescriptor::InitializePlatformSpecific(
     CallInterfaceDescriptorData* data) {
   Register registers[] = {edi, edx};