Add bit_field3 to Map objects

src/objects-debug.cc

Index: src/objects-debug.cc
diff --git a/src/objects-debug.cc b/src/objects-debug.cc
index ba78253ea064f7b0746ca1046c9721c4ee9629b0..ea4d5124fb29e6b34d198cc50882cee6bc2225bd 100644
--- a/src/objects-debug.cc
+++ b/src/objects-debug.cc
@@ -1,4 +1,4 @@
-// Copyright 2010 the V8 project authors. All rights reserved.
+// Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
@@ -272,7 +272,7 @@ void Map::MapVerify() {
 void Map::SharedMapVerify() {
   MapVerify();
   ASSERT(is_shared());
-  ASSERT_EQ(GetHeap()->empty_descriptor_array(), instance_descriptors());
+  ASSERT(instance_descriptors()->IsEmpty());
   ASSERT_EQ(0, pre_allocated_property_fields());
   ASSERT_EQ(0, unused_property_fields());
   ASSERT_EQ(StaticVisitorBase::GetVisitorId(instance_type(), instance_size()),