X64: Omitted creating native builtins and using them in test-heap.

src/objects.cc

Index: src/objects.cc
diff --git a/src/objects.cc b/src/objects.cc
index af5eefd37a6e45ecf88baddf70d11155f256b2b0..91945b2359cad208e28f026e2e72ffc8f850e183 100644
--- a/src/objects.cc
+++ b/src/objects.cc
@@ -536,6 +536,9 @@ void Failure::FailurePrint() {
 
 Failure* Failure::RetryAfterGC(int requested_bytes, AllocationSpace space) {
   ASSERT((space & ~kSpaceTagMask) == 0);
+  // TODO(X64): Stop using Smi validation for non-smi checks, even if they
+  // happen to be identical at the moment.
+
   int requested = requested_bytes >> kObjectAlignmentBits;
   int value = (requested << kSpaceTagSize) | space;
   // We can't very well allocate a heap number in this situation, and if the