Switch Heap::RecordStats to use PagedSpace::SizeOfObjects instead of PagedSpace::Size.

src/heap.cc

Index: src/heap.cc
diff --git a/src/heap.cc b/src/heap.cc
index e6dd2a9657c7f81a7d5c186ad618d7f957eac8bc..be302acbee96113dd1f832b38dbc4afd6d31e15b 100644
--- a/src/heap.cc
+++ b/src/heap.cc
@@ -5625,15 +5625,15 @@ void Heap::RecordStats(HeapStats* stats, bool take_snapshot) {
   *stats->end_marker = HeapStats::kEndMarker;
   *stats->new_space_size = new_space_.SizeAsInt();
   *stats->new_space_capacity = static_cast<int>(new_space_.Capacity());
-  *stats->old_pointer_space_size = old_pointer_space_->Size();
+  *stats->old_pointer_space_size = old_pointer_space_->SizeOfObjects();
   *stats->old_pointer_space_capacity = old_pointer_space_->Capacity();
-  *stats->old_data_space_size = old_data_space_->Size();
+  *stats->old_data_space_size = old_data_space_->SizeOfObjects();
   *stats->old_data_space_capacity = old_data_space_->Capacity();
-  *stats->code_space_size = code_space_->Size();
+  *stats->code_space_size = code_space_->SizeOfObjects();
   *stats->code_space_capacity = code_space_->Capacity();
-  *stats->map_space_size = map_space_->Size();
+  *stats->map_space_size = map_space_->SizeOfObjects();
   *stats->map_space_capacity = map_space_->Capacity();
-  *stats->cell_space_size = cell_space_->Size();
+  *stats->cell_space_size = cell_space_->SizeOfObjects();
   *stats->cell_space_capacity = cell_space_->Capacity();
   *stats->lo_space_size = lo_space_->Size();
   isolate_->global_handles()->RecordStats(stats);