[runtime] Remove useless IN builtin.

src/full-codegen/x64/full-codegen-x64.cc

Index: src/full-codegen/x64/full-codegen-x64.cc
diff --git a/src/full-codegen/x64/full-codegen-x64.cc b/src/full-codegen/x64/full-codegen-x64.cc
index 2010590a0427c5064a0c31739d11bfbceed63128..e6bb7ed40fe3036282d9594ad0a6cada9cfad8a3 100644
--- a/src/full-codegen/x64/full-codegen-x64.cc
+++ b/src/full-codegen/x64/full-codegen-x64.cc
@@ -3162,27 +3162,6 @@ void FullCodeGenerator::EmitIsSmi(CallRuntime* expr) {
 }
 
 
-void FullCodeGenerator::EmitIsNonNegativeSmi(CallRuntime* expr) {
-  ZoneList<Expression*>* args = expr->arguments();
-  DCHECK(args->length() == 1);
-
-  VisitForAccumulatorValue(args->at(0));
-
-  Label materialize_true, materialize_false;
-  Label* if_true = NULL;
-  Label* if_false = NULL;
-  Label* fall_through = NULL;
-  context()->PrepareTest(&materialize_true, &materialize_false,
-                         &if_true, &if_false, &fall_through);
-
-  PrepareForBailoutBeforeSplit(expr, true, if_true, if_false);
-  Condition non_negative_smi = masm()->CheckNonNegativeSmi(rax);
-  Split(non_negative_smi, if_true, if_false, fall_through);
-
-  context()->Plug(if_true, if_false);
-}
-
-
 void FullCodeGenerator::EmitIsSpecObject(CallRuntime* expr) {
   ZoneList<Expression*>* args = expr->arguments();
   DCHECK(args->length() == 1);
@@ -4989,7 +4968,7 @@ void FullCodeGenerator::VisitCompareOperation(CompareOperation* expr) {
   switch (op) {
     case Token::IN:
       VisitForStackValue(expr->right());
-      __ InvokeBuiltin(Context::IN_BUILTIN_INDEX, CALL_FUNCTION);
+      __ CallRuntime(Runtime::kHasProperty, 2);
       PrepareForBailoutBeforeSplit(expr, false, NULL, NULL);
       __ CompareRoot(rax, Heap::kTrueValueRootIndex);
       Split(equal, if_true, if_false, fall_through);