Updates incremental marking pass to collect object statistics.

src/heap/mark-compact.cc

Index: src/heap/mark-compact.cc
diff --git a/src/heap/mark-compact.cc b/src/heap/mark-compact.cc
index 89ca782c267b317fc64bcb27f4c9442bb6424a7d..4ab379847d7f938cf600f42ab171db9e5b9c5574 100644
--- a/src/heap/mark-compact.cc
+++ b/src/heap/mark-compact.cc
@@ -1293,12 +1293,7 @@ class MarkCompactMarkingVisitor
 
 void MarkCompactMarkingVisitor::Initialize() {
   StaticMarkingVisitor<MarkCompactMarkingVisitor>::Initialize();
-
   table_.Register(kVisitJSRegExp, &VisitRegExpAndFlushCode);
-
-  if (FLAG_track_gc_object_stats) {
-    ObjectStatsVisitor::Initialize(&table_);
-  }
 }