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

src/objects-inl.h

Index: src/objects-inl.h
diff --git a/src/objects-inl.h b/src/objects-inl.h
index a13e13febcec68846085c6a5d7eab962ad09ab4d..c3c95be39dd2d7c06e5b0af4aa6e068119263067 100644
--- a/src/objects-inl.h
+++ b/src/objects-inl.h
@@ -764,9 +764,11 @@ Failure* Failure::RetryAfterGC(int requested_bytes) {
 
 Failure* Failure::Construct(Type type, int value) {
   int info = (value << kFailureTypeTagSize) | type;
+  // TODO(X64): Stop using Smi validation for non-smi checks, even if they
+  // happen to be identical at the moment.
   ASSERT(Smi::IsValid(info));  // Same validation check as in Smi
   return reinterpret_cast<Failure*>(
-      static_cast<intptr_t>((info << kFailureTagSize) | kFailureTag));
+      (static_cast<intptr_t>(info) << kFailureTagSize) | kFailureTag);
 }