Starting using GlobalDictionary for global objects instead of NameDictionary.

src/objects.h

Index: src/objects.h
diff --git a/src/objects.h b/src/objects.h
index f9bd19372d58a54f0188e42f6905a16c16051c31..f50860d5be1a4908affab6cb654cf9746afd3747 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -9924,11 +9924,11 @@ class PropertyCell : public HeapObject {
   static PropertyCellType UpdatedType(Handle<PropertyCell> cell,
                                       Handle<Object> value,
                                       PropertyDetails details);
-  static void UpdateCell(Handle<NameDictionary> dictionary, int entry,
+  static void UpdateCell(Handle<GlobalDictionary> dictionary, int entry,
                          Handle<Object> value, PropertyDetails details);
 
-  static Handle<PropertyCell> InvalidateEntry(Handle<NameDictionary> dictionary,
-                                              int entry);
+  static Handle<PropertyCell> InvalidateEntry(
+      Handle<GlobalDictionary> dictionary, int entry);
 
   static void SetValueWithInvalidation(Handle<PropertyCell> cell,
                                        Handle<Object> new_value);