Introduce flag --allocation-site-transitioning

src/ia32/full-codegen-ia32.cc

Index: src/ia32/full-codegen-ia32.cc
diff --git a/src/ia32/full-codegen-ia32.cc b/src/ia32/full-codegen-ia32.cc
index 13f24d5d1076e2950ff25208614cae91169c96b0..f1b30ef0d3e4dfef09a33aa4b1481e345af59424 100644
--- a/src/ia32/full-codegen-ia32.cc
+++ b/src/ia32/full-codegen-ia32.cc
@@ -1737,7 +1737,11 @@ void FullCodeGenerator::VisitArrayLiteral(ArrayLiteral* expr) {
   Handle<FixedArrayBase> constant_elements_values(
       FixedArrayBase::cast(constant_elements->get(1)));
 
-  AllocationSiteMode allocation_site_mode = TRACK_ALLOCATION_SITE;
+  AllocationSiteMode allocation_site_mode =
+      (FLAG_allocation_site_transitioning || FLAG_allocation_site_pretenuring)
+          ? TRACK_ALLOCATION_SITE
+          : DONT_TRACK_ALLOCATION_SITE;
+
   if (has_constant_fast_elements && !FLAG_allocation_site_pretenuring) {
     // If the only customer of allocation sites is transitioning, then
     // we can turn it off if we don't have anywhere else to transition to.