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

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

Index: client/dom/generated/src/frog/SVGFEGaussianBlurElement.dart
diff --git a/client/dom/generated/src/frog/SVGFEGaussianBlurElement.dart b/client/dom/generated/src/frog/SVGFEGaussianBlurElement.dart
index e59cd63e6c615079806d281c57651d19d8a95521..4d19bedea6d7e9e7143d0e0947f6b01b5477c132 100644
--- a/client/dom/generated/src/frog/SVGFEGaussianBlurElement.dart
+++ b/client/dom/generated/src/frog/SVGFEGaussianBlurElement.dart
@@ -1,31 +1,31 @@
 
 class _SVGFEGaussianBlurElementJs extends _SVGElementJs implements SVGFEGaussianBlurElement native "*SVGFEGaussianBlurElement" {
 
-  _SVGAnimatedStringJs get in1() native "return this.in1;";
+  final _SVGAnimatedStringJs in1;
 
-  _SVGAnimatedNumberJs get stdDeviationX() native "return this.stdDeviationX;";
+  final _SVGAnimatedNumberJs stdDeviationX;
 
-  _SVGAnimatedNumberJs get stdDeviationY() native "return this.stdDeviationY;";
+  final _SVGAnimatedNumberJs stdDeviationY;
 
   void setStdDeviation(num stdDeviationX, num stdDeviationY) native;
 
   // From SVGFilterPrimitiveStandardAttributes
 
-  _SVGAnimatedLengthJs get height() native "return this.height;";
+  final _SVGAnimatedLengthJs height;
 
-  _SVGAnimatedStringJs get result() native "return this.result;";
+  final _SVGAnimatedStringJs result;
 
-  _SVGAnimatedLengthJs get width() native "return this.width;";
+  final _SVGAnimatedLengthJs width;
 
-  _SVGAnimatedLengthJs get x() native "return this.x;";
+  final _SVGAnimatedLengthJs x;
 
-  _SVGAnimatedLengthJs get y() native "return this.y;";
+  final _SVGAnimatedLengthJs y;
 
   // From SVGStylable
 
-  _SVGAnimatedStringJs get className() native "return this.className;";
+  final _SVGAnimatedStringJs className;
 
-  _CSSStyleDeclarationJs get style() native "return this.style;";
+  final _CSSStyleDeclarationJs style;
 
   _CSSValueJs getPresentationAttribute(String name) native;
 }