Remove call-indirections from type tests.

sdk/lib/_internal/compiler/implementation/ssa/builder.dart

Index: sdk/lib/_internal/compiler/implementation/ssa/builder.dart
diff --git a/sdk/lib/_internal/compiler/implementation/ssa/builder.dart b/sdk/lib/_internal/compiler/implementation/ssa/builder.dart
index 97c585ccde362a4701c7c1b34710a1b0d9d3c07b..78eb75982ede688eb10d104e79ce8c3da6f07c55 100644
--- a/sdk/lib/_internal/compiler/implementation/ssa/builder.dart
+++ b/sdk/lib/_internal/compiler/implementation/ssa/builder.dart
@@ -2766,14 +2766,11 @@ class SsaBuilder extends ResolvedVisitor implements Visitor {
       // have a subclass.
       HInstruction asFieldName =
           addConstantString(node, backend.namer.substitutionName(element));
-      HInstruction native =
-          graph.addConstantBool(needsNativeCheck, constantSystem);
       List<HInstruction> inputs = <HInstruction>[helperCall,
                                                  expression,
                                                  isFieldName,
                                                  representations,
-                                                 asFieldName,
-                                                 native];
+                                                 asFieldName];
       HInstruction call = new HInvokeStatic(inputs, HType.BOOLEAN);
       add(call);
       instruction = new HIs(type, <HInstruction>[expression, call],