Move frog dart:dom from fields to getters/setters.

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

Index: client/dom/generated/src/frog/WebGLContextAttributes.dart
diff --git a/client/dom/generated/src/frog/WebGLContextAttributes.dart b/client/dom/generated/src/frog/WebGLContextAttributes.dart
index 582c143682f6ddaf8030b67064d44f7cfb13f395..020866a38f0fd6b24be6dc0dff93fd9c4d6f67a9 100644
--- a/client/dom/generated/src/frog/WebGLContextAttributes.dart
+++ b/client/dom/generated/src/frog/WebGLContextAttributes.dart
@@ -1,17 +1,29 @@
 
 class WebGLContextAttributes native "*WebGLContextAttributes" {
 
-  bool alpha;
+  bool get alpha() native "return this.alpha;";
 
-  bool antialias;
+  void set alpha(bool value) native "this.alpha = value;";
 
-  bool depth;
+  bool get antialias() native "return this.antialias;";
 
-  bool premultipliedAlpha;
+  void set antialias(bool value) native "this.antialias = value;";
 
-  bool preserveDrawingBuffer;
+  bool get depth() native "return this.depth;";
 
-  bool stencil;
+  void set depth(bool value) native "this.depth = value;";
+
+  bool get premultipliedAlpha() native "return this.premultipliedAlpha;";
+
+  void set premultipliedAlpha(bool value) native "this.premultipliedAlpha = value;";
+
+  bool get preserveDrawingBuffer() native "return this.preserveDrawingBuffer;";
+
+  void set preserveDrawingBuffer(bool value) native "this.preserveDrawingBuffer = value;";
+
+  bool get stencil() native "return this.stencil;";
+
+  void set stencil(bool value) native "this.stencil = value;";
 
   var dartObjectLocalStorage;