v8_MapTransition.patch

diff --git a/src/objects.cc b/src/objects.cc
index f001d3c..36101a5 100644
--- a/src/objects.cc
+++ b/src/objects.cc
@@ -1637,6 +1637,14 @@ MaybeObject* JSObject::AddFastProperty(String* name,
   MaybeObject* maybe_new_map = map()->CopyAddDescriptor(&new_field, flag);
   if (!maybe_new_map->To(&new_map)) return maybe_new_map;

+  if (FLAG_print_code) {
+    SmartArrayPointer<char> c_string = name->ToCString();
+    PrintF("Map Transition: %p + %s -> %p\n",
+           static_cast<void*>(map()),
+           *c_string,
+           static_cast<void*>(new_map));
+  }
+
   if (map()->unused_property_fields() == 0) {
     ASSERT(values != NULL);
     set_properties(values);