Cleanup old code and refresh on IDL

client/dom/frog/frog_dom.dart

 #library('dom');
 
 #native('frog_dom.js');
 // Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 // DO NOT EDIT
 // Auto-generated Dart DOM library.
 
@@ skipping 276 matching lines @@
 
   HTMLCanvasElement canvas;
 
   var dartObjectLocalStorage;
 
   String get typeName() native;
 }
 
 class CanvasRenderingContext2D extends CanvasRenderingContext native "CanvasRenderingContext2D" {
 
-  Dynamic fillStyle;
+  Object fillStyle;
 
   String font;
 
   num globalAlpha;
 
   String globalCompositeOperation;
 
   String lineCap;
 
   String lineJoin;
 
   num lineWidth;
 
   num miterLimit;
 
   num shadowBlur;
 
   String shadowColor;
 
   num shadowOffsetX;
 
   num shadowOffsetY;
 
-  Dynamic strokeStyle;
+  Object strokeStyle;
 
   String textAlign;
 
   String textBaseline;
 
   List webkitLineDash;
 
   num webkitLineDashOffset;
 
   void arc(num x, num y, num radius, num startAngle, num endAngle, bool anticlockwise) native;
@@ skipping 6279 matching lines @@
 // Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 typedef bool RequestAnimationFrameCallback(int time);
 // Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 typedef void TimeoutHandler();