--- old/src/hotspot/share/gc/g1/g1ConcurrentMark.hpp	2018-03-29 14:51:07.899522334 +0200
+++ new/src/hotspot/share/gc/g1/g1ConcurrentMark.hpp	2018-03-29 14:51:07.642514424 +0200
@@ -373,6 +373,9 @@
 
   void reclaim_empty_regions();
 
+  // After reclaiming empty regions, update heap sizes.
+  void compute_new_sizes();
+
   // Clear statistics gathered during the concurrent cycle for the given region after
   // it has been reclaimed.
   void clear_statistics(HeapRegion* r);