Things to unfork.

Source/WebCore/html/ImageData.idl

 /*
  * Copyright (C) 2008, 2009 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 15 matching lines @@
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 module html {
 
     interface [
         CustomToJS
     ] ImageData {
         readonly attribute long width;
         readonly attribute long height;
-#if !(defined(LANGUAGE_JAVASCRIPT) && LANGUAGE_JAVASCRIPT) || (defined(LANGUAGE_DART) && LANGUAGE_DART)
+#if !defined(LANGUAGE_JAVASCRIPT) || !LANGUAGE_JAVASCRIPT
         readonly attribute CanvasPixelArray data;
 #endif
     };
 
 }