Pretenure call new support.

src/objects-inl.h

Index: src/objects-inl.h
diff --git a/src/objects-inl.h b/src/objects-inl.h
index f831c11d493942b5e3c9f0eccb4232661e1100f7..618cf30f760affb5a163268e60f2410e54d275bd 100644
--- a/src/objects-inl.h
+++ b/src/objects-inl.h
@@ -1474,7 +1474,8 @@ void AllocationSite::MarkZombie() {
 // elements kind is the initial elements kind.
 AllocationSiteMode AllocationSite::GetMode(
     ElementsKind boilerplate_elements_kind) {
-  if (IsFastSmiElementsKind(boilerplate_elements_kind)) {
+  if (FLAG_pretenuring_call_new ||
+      IsFastSmiElementsKind(boilerplate_elements_kind)) {
     return TRACK_ALLOCATION_SITE;
   }
 
@@ -1484,8 +1485,9 @@ AllocationSiteMode AllocationSite::GetMode(
 
 AllocationSiteMode AllocationSite::GetMode(ElementsKind from,
                                            ElementsKind to) {
-  if (IsFastSmiElementsKind(from) &&
-      IsMoreGeneralElementsKindTransition(from, to)) {
+  if (FLAG_pretenuring_call_new ||
+      (IsFastSmiElementsKind(from) &&
+       IsMoreGeneralElementsKindTransition(from, to))) {
     return TRACK_ALLOCATION_SITE;
   }