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

src/objects.h

 // 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 2585 matching lines @@
   // [id]: the script id.
   DECL_ACCESSORS(id, Object)
 
   // [line_offset]: script line offset in resource from where it was extracted.
   DECL_ACCESSORS(line_offset, Smi)
 
   // [column_offset]: script column offset in resource from where it was
   // extracted.
   DECL_ACCESSORS(column_offset, Smi)
 
+  // [data]: additional data associated with this script.
+  DECL_ACCESSORS(data, Object)
+
   // [wrapper]: the wrapper cache.
   DECL_ACCESSORS(wrapper, Proxy)
 
   // [type]: the script type.
   DECL_ACCESSORS(type, Smi)
 
   // [line_ends]: array of line ends positions
   DECL_ACCESSORS(line_ends, Object)
 
   static inline Script* cast(Object* obj);
 
 #ifdef DEBUG
   void ScriptPrint();
   void ScriptVerify();
 #endif
 
   static const int kSourceOffset = HeapObject::kHeaderSize;
   static const int kNameOffset = kSourceOffset + kPointerSize;
   static const int kLineOffsetOffset = kNameOffset + kPointerSize;
   static const int kColumnOffsetOffset = kLineOffsetOffset + kPointerSize;
-  static const int kWrapperOffset = kColumnOffsetOffset + kPointerSize;
+  static const int kDataOffset = kColumnOffsetOffset + kPointerSize;
+  static const int kWrapperOffset = kDataOffset + kPointerSize;
   static const int kTypeOffset = kWrapperOffset + kPointerSize;
   static const int kLineEndsOffset = kTypeOffset + kPointerSize;
   static const int kIdOffset = kLineEndsOffset + kPointerSize;
   static const int kSize = kIdOffset + kPointerSize;
 
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(Script);
 };
 
 
@@ skipping 1706 matching lines @@
     } else {
       value &= ~(1 << bit_position);
     }
     return value;
   }
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_H_