Move IncrementalRecordWrite to a stub.

src/mark-compact.cc

 // Copyright 2006-2008 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:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 151 matching lines @@
     MarkLiveObjects();
   } else {
     {
       GCTracer::Scope gc_scope(tracer_, GCTracer::Scope::MC_MARK);
       IncrementalMarking::Finalize();
       ASSERT(IncrementalMarking::state() == IncrementalMarking::STOPPED);
     }
     MarkLiveObjects();
   }
 
+  if (FLAG_collect_maps) ClearNonLiveTransitions();
+
 #ifdef DEBUG
   VerifyMarking();
 #endif
-  if (FLAG_collect_maps) ClearNonLiveTransitions();
 
   SweepSpaces();
 
   PcToCodeCache::FlushPcToCodeCache();
 
   Finish();
 
   // Check that swept all marked objects and
   // null out the GC tracer.
   // TODO(gc) does not work with conservative sweeping.
@@ skipping 2066 matching lines @@
 }
 
 
 void MarkCompactCollector::Initialize() {
   StaticPointersToNewGenUpdatingVisitor::Initialize();
   StaticMarkingVisitor::Initialize();
 }
 
 
 } }  // namespace v8::internal