Revert "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 bb0c6d710f764b77a96776a06ef53f79c21c977b..bb9ba2350af2e258dab1a0097275d1443245a785 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);
 }