Use 'field' syntax in dart:dom interfaces.

client/dom/generated/src/interface/WebGLContextAttributes.dart

 // 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.
 
 // WARNING: Do not edit - generated code.
 
 interface WebGLContextAttributes {
 
-  bool get alpha();
+  bool alpha;
 
-  void set alpha(bool value);
+  bool antialias;
 
-  bool get antialias();
+  bool depth;
 
-  void set antialias(bool value);
+  bool premultipliedAlpha;
 
-  bool get depth();
+  bool preserveDrawingBuffer;
 
-  void set depth(bool value);
-
-  bool get premultipliedAlpha();
-
-  void set premultipliedAlpha(bool value);
-
-  bool get preserveDrawingBuffer();
-
-  void set preserveDrawingBuffer(bool value);
-
-  bool get stencil();
-
-  void set stencil(bool value);
+  bool stencil;
 }