--- old/src/hotspot/share/gc/g1/g1Policy.hpp	2019-06-04 13:17:04.344651169 -0700
+++ new/src/hotspot/share/gc/g1/g1Policy.hpp	2019-06-04 13:17:04.096651178 -0700
@@ -125,6 +125,14 @@
     hr->install_surv_rate_group(_short_lived_surv_rate_group);
   }
 
+  void set_region_eden_from_survivor(HeapRegion* hr) {
+    hr->set_eden_pre_gc();
+
+    // The given heap region does not yet have a survivor surv rate group. So no need
+    // to uninstall it, but need to install eden surv rate group via retained version.
+    hr->install_surv_rate_group_for_retained(_short_lived_surv_rate_group);
+  }
+
   void set_region_survivor(HeapRegion* hr) {
     assert(hr->is_survivor(), "pre-condition");
     hr->install_surv_rate_group(_survivor_surv_rate_group);