diff -r 6719a2e727c0 -r 32a87dd6b746 hotspot/src/share/vm/memory/modRefBarrierSet.hpp
--- a/hotspot/src/share/vm/memory/modRefBarrierSet.hpp	Fri Apr 29 12:40:49 2011 -0400
+++ b/hotspot/src/share/vm/memory/modRefBarrierSet.hpp	Fri Apr 29 14:59:04 2011 -0400
@@ -100,12 +100,6 @@
   // Pass along the argument to the superclass.
   ModRefBarrierSet(int max_covered_regions) :
     BarrierSet(max_covered_regions) {}
-
-#ifndef PRODUCT
-  // Verifies that the given region contains no modified references.
-  virtual void verify_clean_region(MemRegion mr) = 0;
-#endif
-
 };
 
 #endif // SHARE_VM_MEMORY_MODREFBARRIERSET_HPP