Avoid SLOW_ASSERT when calling HeapGraphNode::GetChildrenCount

src/heap-snapshot-generator-inl.h

Index: src/heap-snapshot-generator-inl.h
diff --git a/src/heap-snapshot-generator-inl.h b/src/heap-snapshot-generator-inl.h
index 43002d2d2b170346dd124093783bd65c64682b5a..e16d309969d77299b80835a0efee3e75a483a11f 100644
--- a/src/heap-snapshot-generator-inl.h
+++ b/src/heap-snapshot-generator-inl.h
@@ -59,7 +59,8 @@ int HeapEntry::set_children_index(int index) {
 
 HeapGraphEdge** HeapEntry::children_arr() {
   ASSERT(children_index_ >= 0);
-  return &snapshot_->children()[children_index_];
+  SLOW_ASSERT(children_index_ <= snapshot_->children().length());

[alph, 2013/12/18 13:46:59]

SLOW_ASSERT(children_index_ < snapshot_->children().length() ||
            children_index_ == snapshot_->children().length() && children_count_
== 0)

[yurys, 2013/12/18 15:07:15]

Done.

+  return &snapshot_->children().first() + children_index_;
 }