--- a/hotspot/src/share/vm/gc/g1/g1CollectorPolicy.hpp	Wed Mar 09 14:18:12 2016 +0100
+++ b/hotspot/src/share/vm/gc/g1/g1CollectorPolicy.hpp	Wed Mar 09 11:08:49 2016 -0800
@@ -177,6 +177,8 @@
     _max_rs_lengths = rs_lengths;
   }
 
+  size_t predict_rs_lengths() const;
+
   size_t predict_rs_length_diff() const;
 
   double predict_alloc_rate_ms() const;