Use fields in hidden native DOM classes instead of getters/setters.

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

 
 class _SVGTransformJs extends _DOMTypeJs implements SVGTransform native "*SVGTransform" {
 
   static final int SVG_TRANSFORM_MATRIX = 1;
 
   static final int SVG_TRANSFORM_ROTATE = 4;
 
   static final int SVG_TRANSFORM_SCALE = 3;
 
   static final int SVG_TRANSFORM_SKEWX = 5;
 
   static final int SVG_TRANSFORM_SKEWY = 6;
 
   static final int SVG_TRANSFORM_TRANSLATE = 2;
 
   static final int SVG_TRANSFORM_UNKNOWN = 0;
 
-  num get angle() native "return this.angle;";
+  final num angle;
 
-  _SVGMatrixJs get matrix() native "return this.matrix;";
+  final _SVGMatrixJs matrix;
 
-  int get type() native "return this.type;";
+  final int type;
 
   void setMatrix(_SVGMatrixJs matrix) native;
 
   void setRotate(num angle, num cx, num cy) native;
 
   void setScale(num sx, num sy) native;
 
   void setSkewX(num angle) native;
 
   void setSkewY(num angle) native;
 
   void setTranslate(num tx, num ty) native;
 }