Shrink initial old generation size based on new space survival rate.

src/heap/heap.h

Index: src/heap/heap.h
diff --git a/src/heap/heap.h b/src/heap/heap.h
index 50fe52dd8d70eea68307361814100fb84ef9506d..f891bbddc0a4e5c72c1e01eaac302e69e8be792c 100644
--- a/src/heap/heap.h
+++ b/src/heap/heap.h
@@ -1506,6 +1506,8 @@ class Heap {
   int initial_semispace_size_;
   int target_semispace_size_;
   intptr_t max_old_generation_size_;
+  intptr_t initial_old_generation_size_;
+  bool old_generation_size_configured_;
   intptr_t max_executable_size_;
   intptr_t maximum_committed_;
 
@@ -1993,8 +1995,10 @@ class Heap {
 
   int high_survival_rate_period_length_;
   intptr_t promoted_objects_size_;
+  double promotion_ratio_;
   double promotion_rate_;
   intptr_t semi_space_copied_object_size_;
+  intptr_t previous_semi_space_copied_object_size_;
   double semi_space_copied_rate_;
   int nodes_died_in_new_space_;
   int nodes_copied_in_new_space_;
@@ -2010,6 +2014,8 @@ class Heap {
   // Re-visit incremental marking heuristics.
   bool IsHighSurvivalRate() { return high_survival_rate_period_length_ > 0; }
 
+  void ConfigureInitialOldGenerationSize();
+
   void SelectScavengingVisitorsTable();
 
   void IdleMarkCompact(const char* message);