Add boolean to tell if V8 zaps allocated memory

include/v8.h

Index: include/v8.h
diff --git a/include/v8.h b/include/v8.h
index 25a1d58fb9e0ed1f46c389dfee0bdab7e459a10f..fde18dcafed451bc669b646b2df9a8b2387ade85 100644
--- a/include/v8.h
+++ b/include/v8.h
@@ -5007,6 +5007,7 @@ class V8_EXPORT HeapStatistics {
   size_t total_available_size() { return total_available_size_; }
   size_t used_heap_size() { return used_heap_size_; }
   size_t heap_size_limit() { return heap_size_limit_; }
+  size_t does_zap_garbage() { return does_zap_garbage_; }
 
  private:
   size_t total_heap_size_;
@@ -5015,6 +5016,7 @@ class V8_EXPORT HeapStatistics {
   size_t total_available_size_;
   size_t used_heap_size_;
   size_t heap_size_limit_;
+  bool does_zap_garbage_;
 
   friend class V8;
   friend class Isolate;