first step to remove unsafe handles

src/global-handles.cc

 // Copyright 2009 the V8 project authors. All rights reserved.
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 // 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
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 //       with the distribution.
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+// TODO(dcarney): remove
+#define V8_ALLOW_ACCESS_TO_PERSISTENT_IMPLICIT
+
 #include "v8.h"
 
 #include "api.h"
 #include "global-handles.h"
 
 #include "vm-state-inl.h"
 
 namespace v8 {
 namespace internal {
 
@@ skipping 969 matching lines @@
     }
   }
   object_group_connections_.Clear();
   object_group_connections_.Initialize(kObjectGroupConnectionsCapacity);
   retainer_infos_.Clear();
   implicit_ref_connections_.Clear();
 }
 
 
 } }  // namespace v8::internal