Array constructor shouldn't require a Cell, just an AllocationSite.

src/runtime.cc

Index: src/runtime.cc
diff --git a/src/runtime.cc b/src/runtime.cc
index 8697a91ce5a4edfbc20e2c4447bba64d773eb0f0..e877d79623a6ca4b8ada9a133ef6d0cfdbad5d71 100644
--- a/src/runtime.cc
+++ b/src/runtime.cc
@@ -14779,10 +14779,8 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_ArrayConstructor) {
 
   Handle<AllocationSite> site;
   if (!type_info.is_null() &&
-      *type_info != isolate->heap()->undefined_value() &&
-      Cell::cast(*type_info)->value()->IsAllocationSite()) {
-    site = Handle<AllocationSite>(
-        AllocationSite::cast(Cell::cast(*type_info)->value()), isolate);
+      *type_info != isolate->heap()->undefined_value()) {
+    site = Handle<AllocationSite>::cast(type_info);
     ASSERT(!site->SitePointsToLiteral());
   }