Make it possible to add a user data object to each script compiled

src/bootstrapper.cc

 // Copyright 2006-2008 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 1001 matching lines @@
             proxy_line_offset,
             common_attributes);
     Handle<Proxy> proxy_column_offset =
         Factory::NewProxy(&Accessors::ScriptColumnOffset);
     script_descriptors =
         Factory::CopyAppendProxyDescriptor(
             script_descriptors,
             Factory::LookupAsciiSymbol("column_offset"),
             proxy_column_offset,
             common_attributes);
+    Handle<Proxy> proxy_data = Factory::NewProxy(&Accessors::ScriptData);
+    script_descriptors =
+        Factory::CopyAppendProxyDescriptor(
+            script_descriptors,
+            Factory::LookupAsciiSymbol("data"),
+            proxy_data,
+            common_attributes);
     Handle<Proxy> proxy_type = Factory::NewProxy(&Accessors::ScriptType);
     script_descriptors =
         Factory::CopyAppendProxyDescriptor(
             script_descriptors,
             Factory::LookupAsciiSymbol("type"),
             proxy_type,
             common_attributes);
     Handle<Proxy> proxy_line_ends =
         Factory::NewProxy(&Accessors::ScriptLineEnds);
     script_descriptors =
@@ skipping 493 matching lines @@
 }
 
 
 // Restore statics that are thread local.
 char* Genesis::RestoreState(char* from) {
   current_ = *reinterpret_cast<Genesis**>(from);
   return from + sizeof(current_);
 }
 
 } }  // namespace v8::internal