Add boolean flag to HChange and LNumberUntagD to not convert undefined to NaN.

src/ia32/lithium-ia32.cc

Index: src/ia32/lithium-ia32.cc
diff --git a/src/ia32/lithium-ia32.cc b/src/ia32/lithium-ia32.cc
index 44af661199a2371c49d823089fd999bba191c7fc..65e59729476f54e5c20e2d9bbdac6b55f7699143 100644
--- a/src/ia32/lithium-ia32.cc
+++ b/src/ia32/lithium-ia32.cc
@@ -1676,7 +1676,8 @@ LInstruction* LChunkBuilder::DoChange(HChange* instr) {
   if (from.IsTagged()) {
     if (to.IsDouble()) {
       LOperand* value = UseRegister(instr->value());
-      LNumberUntagD* res = new LNumberUntagD(value);
+      LNumberUntagD* res =
+          new LNumberUntagD(value, instr->deoptimize_on_undefined());
       return AssignEnvironment(DefineAsRegister(res));
     } else {
       ASSERT(to.IsInteger32());