Make DOMType the root of DOM implementation types.

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

Index: client/dom/generated/src/frog/WheelEvent.dart
diff --git a/client/dom/generated/src/frog/WheelEvent.dart b/client/dom/generated/src/frog/WheelEvent.dart
index f4baad7a9bf428866887601ee3236d8562a298c7..ae90d30787f81e0cdf03ab6d74a17a0fceb6a6f9 100644
--- a/client/dom/generated/src/frog/WheelEvent.dart
+++ b/client/dom/generated/src/frog/WheelEvent.dart
@@ -1,5 +1,5 @@
 
-class WheelEventJS extends UIEventJS implements WheelEvent native "*WheelEvent" {
+class WheelEventJs extends UIEventJs implements WheelEvent native "*WheelEvent" {
 
   bool get altKey() native "return this.altKey;";
 
@@ -33,5 +33,5 @@ class WheelEventJS extends UIEventJS implements WheelEvent native "*WheelEvent"
 
   int get y() native "return this.y;";
 
-  void initWebKitWheelEvent(int wheelDeltaX, int wheelDeltaY, DOMWindowJS view, int screenX, int screenY, int clientX, int clientY, bool ctrlKey, bool altKey, bool shiftKey, bool metaKey) native;
+  void initWebKitWheelEvent(int wheelDeltaX, int wheelDeltaY, DOMWindowJs view, int screenX, int screenY, int clientX, int clientY, bool ctrlKey, bool altKey, bool shiftKey, bool metaKey) native;
 }