Better support for 'polymorphic' JS and external arrays

src/zone.h

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 174 matching lines @@
   explicit ZoneList(const ZoneList<T>& other)
       : List<T, ZoneListAllocationPolicy>(other.length()) {
     AddAll(other);
   }
 };
 
 
 // Introduce a convenience type for zone lists of map handles.
 typedef ZoneList<Handle<Map> > ZoneMapList;
 
+// Introduce a convenience type for zone lists of code handles.
+typedef ZoneList<Handle<Code> > ZoneCodeList;
 
 // ZoneScopes keep track of the current parsing and compilation
 // nesting and cleans up generated ASTs in the Zone when exiting the
 // outer-most scope.
 class ZoneScope BASE_EMBEDDED {
  public:
   // TODO(isolates): pass isolate pointer here.
   inline explicit ZoneScope(ZoneScopeMode mode);
 
   virtual ~ZoneScope();
@@ skipping 22 matching lines @@
  public:
   ZoneSplayTree()
       : SplayTree<Config, ZoneListAllocationPolicy>() {}
   ~ZoneSplayTree();
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_ZONE_H_