External references should not affect dominance relation.

src/api.cc

Index: src/api.cc
diff --git a/src/api.cc b/src/api.cc
index 067609a733a9416f6e0c09195dcaeb48f4ee8261..921368bfc783784f03be3f3fc8f57b2214611e9c 100644
--- a/src/api.cc
+++ b/src/api.cc
@@ -5998,7 +5998,7 @@ Handle<Value> HeapGraphEdge::GetName() const {
 const HeapGraphNode* HeapGraphEdge::GetFromNode() const {
   i::Isolate* isolate = i::Isolate::Current();
   IsDeadCheck(isolate, "v8::HeapGraphEdge::GetFromNode");
-  const i::HeapEntry* from = ToInternal(this)->From();
+  const i::HeapEntry* from = ToInternal(this)->from();
   return reinterpret_cast<const HeapGraphNode*>(from);
 }