Ensure newly allocated empty Arrays are transitioned to FAST_ELEMENT

src/objects.h

Index: src/objects.h
diff --git a/src/objects.h b/src/objects.h
index a0e77cb86dbd63a8bff729b21e37a57878b8a619..f325a3d5ec5621c5fce58c0ce41105c0c9314dc3 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -1928,6 +1928,10 @@ class JSObject: public JSReceiver {
       FILE* file, ElementsKind from_kind, FixedArrayBase* from_elements,
       ElementsKind to_kind, FixedArrayBase* to_elements);
 
+  void RecordElementsTransition(
+      ElementsKind from_kind, FixedArrayBase* from_elements,
+      ElementsKind to_kind, FixedArrayBase* to_elements);
+
 #ifdef DEBUG
   // Structure for collecting spill information about JSObjects.
   class SpillInformation {