[elements] Avoid using IsKey in loops

src/objects-inl.h

Index: src/objects-inl.h
diff --git a/src/objects-inl.h b/src/objects-inl.h
index 25400f63b0d4665adab313ed7a50b6b62de8e440..0167f63408caaba7311799cbbe11b0ad7947feae 100644
--- a/src/objects-inl.h
+++ b/src/objects-inl.h
@@ -2998,6 +2998,9 @@ int HashTableBase::ComputeCapacity(int at_least_space_for) {
   return Max(capacity, kMinCapacity);
 }
 
+bool HashTableBase::IsKey(Heap* heap, Object* k) {
+  return k != heap->the_hole_value() && k != heap->undefined_value();
+}
 
 bool HashTableBase::IsKey(Object* k) {

[Yang, 2016/04/01 13:29:53]

do we still need this one?

   return !k->IsTheHole() && !k->IsUndefined();