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

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

 
 class _HTMLMarqueeElementJs extends _HTMLElementJs implements HTMLMarqueeElement native "*HTMLMarqueeElement" {
 
-  String get behavior() native "return this.behavior;";
+  String behavior;
 
-  void set behavior(String value) native "this.behavior = value;";
+  String bgColor;
 
-  String get bgColor() native "return this.bgColor;";
+  String direction;
 
-  void set bgColor(String value) native "this.bgColor = value;";
+  String height;
 
-  String get direction() native "return this.direction;";
+  int hspace;
 
-  void set direction(String value) native "this.direction = value;";
+  int loop;
 
-  String get height() native "return this.height;";
+  int scrollAmount;
 
-  void set height(String value) native "this.height = value;";
+  int scrollDelay;
 
-  int get hspace() native "return this.hspace;";
+  bool trueSpeed;
 
-  void set hspace(int value) native "this.hspace = value;";
+  int vspace;
 
-  int get loop() native "return this.loop;";
-
-  void set loop(int value) native "this.loop = value;";
-
-  int get scrollAmount() native "return this.scrollAmount;";
-
-  void set scrollAmount(int value) native "this.scrollAmount = value;";
-
-  int get scrollDelay() native "return this.scrollDelay;";
-
-  void set scrollDelay(int value) native "this.scrollDelay = value;";
-
-  bool get trueSpeed() native "return this.trueSpeed;";
-
-  void set trueSpeed(bool value) native "this.trueSpeed = value;";
-
-  int get vspace() native "return this.vspace;";
-
-  void set vspace(int value) native "this.vspace = value;";
-
-  String get width() native "return this.width;";
-
-  void set width(String value) native "this.width = value;";
+  String width;
 
   void start() native;
 
   void stop() native;
 }