Implement target cache for constructor calls.

src/objects-visiting-inl.h

Index: src/objects-visiting-inl.h
diff --git a/src/objects-visiting-inl.h b/src/objects-visiting-inl.h
index 12b044ca989f7780580ce654359309602aaf378c..880b44b50e2d638a0853952d112dcbed49127a62 100644
--- a/src/objects-visiting-inl.h
+++ b/src/objects-visiting-inl.h
@@ -109,6 +109,7 @@ void Code::CodeIterateBody(ObjectVisitor* v) {
   IteratePointer(v, kRelocationInfoOffset);
   IteratePointer(v, kHandlerTableOffset);
   IteratePointer(v, kDeoptimizationDataOffset);
+  IteratePointer(v, kTypeFeedbackCellsOffset);
 
   RelocIterator it(this, mode_mask);
   for (; !it.done(); it.next()) {
@@ -138,6 +139,9 @@ void Code::CodeIterateBody(Heap* heap) {
   StaticVisitor::VisitPointer(
       heap,
       reinterpret_cast<Object**>(this->address() + kDeoptimizationDataOffset));
+  StaticVisitor::VisitPointer(
+      heap,
+      reinterpret_cast<Object**>(this->address() + kTypeFeedbackCellsOffset));
 
   RelocIterator it(this, mode_mask);
   for (; !it.done(); it.next()) {