Disinherit PropertyCell from Cell

src/heap-snapshot-generator.cc

Index: src/heap-snapshot-generator.cc
diff --git a/src/heap-snapshot-generator.cc b/src/heap-snapshot-generator.cc
index 812311f7c8f1be51559cbf575eac937897f81ad2..5864ad9b43fb9e82cf55b8e35a0bd0a3749d3ee7 100644
--- a/src/heap-snapshot-generator.cc
+++ b/src/heap-snapshot-generator.cc
@@ -1512,7 +1512,8 @@ void V8HeapExplorer::ExtractCellReferences(int entry, Cell* cell) {
 
 void V8HeapExplorer::ExtractPropertyCellReferences(int entry,
                                                    PropertyCell* cell) {
-  ExtractCellReferences(entry, cell);
+  SetInternalReference(cell, entry, "value", cell->value(),
+                       PropertyCell::kValueOffset);
   MarkAsWeakContainer(cell->dependent_code());
   SetInternalReference(cell, entry, "dependent_code", cell->dependent_code(),
                        PropertyCell::kDependentCodeOffset);