--- old/src/hotspot/share/gc/g1/g1CollectorPolicy.hpp	2018-11-19 14:05:10.442402300 -0800
+++ new/src/hotspot/share/gc/g1/g1CollectorPolicy.hpp	2018-11-19 14:05:09.490944700 -0800
@@ -38,6 +38,17 @@
 
 public:
   G1CollectorPolicy();
+  virtual size_t heap_reservation_size_bytes();
+};
+
+class G1HeteroCollectorPolicy : public G1CollectorPolicy {
+  size_t _heap_reservation_size_bytes;
+
+protected:
+  void initialize_size_info();
+public:
+  G1HeteroCollectorPolicy();
+  size_t heap_reservation_size_bytes();
 };
 
 #endif // SHARE_VM_GC_G1_G1COLLECTORPOLICY_HPP