Remove PseudoId.

sky/engine/core/frame/Window.idl

 /*
  * Copyright (C) 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
  * Copyright (C) 2011 Google 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 59 matching lines @@
     // DOM Level 2 AbstractView Interface
     readonly attribute Document document;
 
     // CSSOM View Module
     MediaQueryList matchMedia(DOMString query);
 
     // styleMedia has been removed from the CSSOM View specification.
     readonly attribute StyleMedia styleMedia;
 
     // DOM Level 2 Style Interface
-    CSSStyleDeclaration getComputedStyle([Default=Undefined] optional Element element,
-                                         [TreatUndefinedAs=NullString, Default=Undefined] optional DOMString? pseudoElement);
+    CSSStyleDeclaration getComputedStyle([Default=Undefined] optional Element element);
 
     [Replaceable] readonly attribute double devicePixelRatio;
 
     // This is the interface orientation in degrees. Some examples are:
     //  0 is straight up; -90 is when the device is rotated 90 clockwise;
     //  90 is when rotated counter clockwise.
     [RuntimeEnabled=OrientationEvent, MeasureAs=WindowOrientation] readonly attribute long orientation;
 
     [Replaceable] readonly attribute Console console;
 
     [MeasureAs=UnprefixedRequestAnimationFrame] long requestAnimationFrame(RequestAnimationFrameCallback callback);
     void cancelAnimationFrame(long id);
 
     [Replaceable] readonly attribute CSS CSS;
 
     // window.toString() requires special handling in V8
     [DoNotCheckSignature, DoNotCheckSecurity, Custom, NotEnumerable] stringifier;
 
     // FIXME(sky): can't remove w/o also removing hacks in bindings generator.
     [Custom, NotEnumerable] getter Window (DOMString name);
 };
 
 Window implements WindowBase64;
 Window implements WindowTimers;