[turbofan] Add NewUnmappedArgumentsElements and NewRestParametersArguments.

src/interface-descriptors.cc

Index: src/interface-descriptors.cc
diff --git a/src/interface-descriptors.cc b/src/interface-descriptors.cc
index e4600ca52b6e26c852b575e552cf91808f986231..18534a4a317cd29ebdeb63a3a8c5bd508ef81b45 100644
--- a/src/interface-descriptors.cc
+++ b/src/interface-descriptors.cc
@@ -294,6 +294,18 @@ void GrowArrayElementsDescriptor::InitializePlatformSpecific(
   data->InitializePlatformSpecific(arraysize(registers), registers);
 }
 
+void NewArgumentsElementsDescriptor::InitializePlatformIndependent(
+    CallInterfaceDescriptorData* data) {
+  MachineType const kMachineTypes[] = {MachineType::IntPtr()};
+  data->InitializePlatformIndependent(arraysize(kMachineTypes), 0,
+                                      kMachineTypes);
+}
+
+void NewArgumentsElementsDescriptor::InitializePlatformSpecific(
+    CallInterfaceDescriptorData* data) {
+  DefaultInitializePlatformSpecific(data, 1);
+}
+
 void VarArgFunctionDescriptor::InitializePlatformIndependent(
     CallInterfaceDescriptorData* data) {
   // kActualArgumentsCount