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

src/arm/lithium-arm.cc

Index: src/arm/lithium-arm.cc
diff --git a/src/arm/lithium-arm.cc b/src/arm/lithium-arm.cc
index 8ec43184c5288db0576966b49651aebfde835ebf..25f8bcc574b6925df6700653ae140888f4d74da0 100644
--- a/src/arm/lithium-arm.cc
+++ b/src/arm/lithium-arm.cc
@@ -1651,7 +1651,8 @@ 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());