--- old/src/share/vm/gc/g1/g1CollectedHeap.hpp	2015-11-19 16:20:54.623075579 +0100
+++ new/src/share/vm/gc/g1/g1CollectedHeap.hpp	2015-11-19 16:20:54.531072876 +0100
@@ -1352,6 +1352,10 @@
     return (region_size / 2);
   }
 
+  // Returns the number of regions the humongous object of the given word size
+  // requires.
+  static size_t humongous_obj_size_in_regions(size_t word_size);
+
   // Update mod union table with the set of dirty cards.
   void updateModUnion();