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

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

Index: client/dom/generated/src/frog/SVGFEMergeElement.dart
diff --git a/client/dom/generated/src/frog/SVGFEMergeElement.dart b/client/dom/generated/src/frog/SVGFEMergeElement.dart
index 9dba9861bf09cb5ddfc51d26d04cb833fcc1c86d..dd92696b743ba30cdf6db6038d6f51354611c241 100644
--- a/client/dom/generated/src/frog/SVGFEMergeElement.dart
+++ b/client/dom/generated/src/frog/SVGFEMergeElement.dart
@@ -3,21 +3,21 @@ class SVGFEMergeElement extends SVGElement native "*SVGFEMergeElement" {
 
   // From SVGFilterPrimitiveStandardAttributes
 
-  SVGAnimatedLength height;
+  SVGAnimatedLength get height() native "return this.height;";
 
-  SVGAnimatedString result;
+  SVGAnimatedString get result() native "return this.result;";
 
-  SVGAnimatedLength width;
+  SVGAnimatedLength get width() native "return this.width;";
 
-  SVGAnimatedLength x;
+  SVGAnimatedLength get x() native "return this.x;";
 
-  SVGAnimatedLength y;
+  SVGAnimatedLength get y() native "return this.y;";
 
   // From SVGStylable
 
-  SVGAnimatedString className;
+  SVGAnimatedString get className() native "return this.className;";
 
-  CSSStyleDeclaration style;
+  CSSStyleDeclaration get style() native "return this.style;";
 
   CSSValue getPresentationAttribute(String name) native;
 }