Cleanup change.

runtime/vm/flow_graph_compiler_ia32.cc

Index: runtime/vm/flow_graph_compiler_ia32.cc
diff --git a/runtime/vm/flow_graph_compiler_ia32.cc b/runtime/vm/flow_graph_compiler_ia32.cc
index a60a73a18ce7c2983248ba02655fb286d2169930..e1dae4f8a6ff258fe80f319ca0b9154da7d5b9ea 100644
--- a/runtime/vm/flow_graph_compiler_ia32.cc
+++ b/runtime/vm/flow_graph_compiler_ia32.cc
@@ -354,8 +354,8 @@ bool FlowGraphCompiler::GenerateInstantiatedTypeNoArgumentsTest(
   __ testl(kInstanceReg, Immediate(kSmiTagMask));
   // If instance is Smi, check directly.
   const Class& smi_class = Class::Handle(zone(), Smi::Class());
-  if (smi_class.IsSubtypeOf(TypeArguments::Handle(zone()), type_class,
-                            TypeArguments::Handle(zone()), NULL, NULL,
+  if (smi_class.IsSubtypeOf(Object::null_type_arguments(), type_class,
+                            Object::null_type_arguments(), NULL, NULL,
                             Heap::kOld)) {
     __ j(ZERO, is_instance_lbl);
   } else {