Revert of [runtime] Remove useless IN builtin.

src/full-codegen/mips/full-codegen-mips.cc

Index: src/full-codegen/mips/full-codegen-mips.cc
diff --git a/src/full-codegen/mips/full-codegen-mips.cc b/src/full-codegen/mips/full-codegen-mips.cc
index 0d655162f284fc1ad75978e0f3e930521f73378c..d3139a7d4ecf46b22cca766c416a767967aeb91d 100644
--- a/src/full-codegen/mips/full-codegen-mips.cc
+++ b/src/full-codegen/mips/full-codegen-mips.cc
@@ -3336,6 +3336,27 @@
   PrepareForBailoutBeforeSplit(expr, true, if_true, if_false);
   __ SmiTst(v0, t0);
   Split(eq, t0, Operand(zero_reg), if_true, if_false, fall_through);
+
+  context()->Plug(if_true, if_false);
+}
+
+
+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);
+  __ NonNegativeSmiTst(v0, at);
+  Split(eq, at, Operand(zero_reg), if_true, if_false, fall_through);
 
   context()->Plug(if_true, if_false);
 }
@@ -5090,7 +5111,7 @@
   switch (op) {
     case Token::IN:
       VisitForStackValue(expr->right());
-      __ CallRuntime(Runtime::kHasProperty, 2);
+      __ InvokeBuiltin(Builtins::IN, CALL_FUNCTION);
       PrepareForBailoutBeforeSplit(expr, false, NULL, NULL);
       __ LoadRoot(t0, Heap::kTrueValueRootIndex);
       Split(eq, v0, Operand(t0), if_true, if_false, fall_through);