Scale old generation growing strategy based on allocation rate.

src/heap/heap.h

Index: src/heap/heap.h
diff --git a/src/heap/heap.h b/src/heap/heap.h
index ad5ef6601517aa6f9ed82b93a24224be6004d67e..f1cf40818787b3fa4703ff54f539e4f11c05d40a 100644
--- a/src/heap/heap.h
+++ b/src/heap/heap.h
@@ -1153,7 +1153,7 @@ class Heap {
 
   // Sets the allocation limit to trigger the next full garbage collection.
   void SetOldGenerationAllocationLimit(intptr_t old_gen_size,
-                                       int freed_global_handles);
+                                       size_t current_allocation_throughput);
 
   // Indicates whether inline bump-pointer allocation has been disabled.
   bool inline_allocation_disabled() { return inline_allocation_disabled_; }