Supporting AllocationSiteInfo for Nested arrays

src/heap.h

Index: src/heap.h
diff --git a/src/heap.h b/src/heap.h
index d26c38476acf699adb70146d69f719a611d9bfd0..619ef713b00e106ff5aa1e595a193810be68f99a 100644
--- a/src/heap.h
+++ b/src/heap.h
@@ -521,6 +521,9 @@ class Heap {
   intptr_t MaxOldGenerationSize() { return max_old_generation_size_; }
   intptr_t MaxExecutableSize() { return max_executable_size_; }
 
+  int gc_count() { return gc_count_; }
+  Address gc_count_address() { return reinterpret_cast<Address>(&gc_count_); }
+
   // Returns the capacity of the heap in bytes w/o growing. Heap grows when
   // more spaces are needed until it reaches the limit.
   intptr_t Capacity();