fix sunflower -- dom types were not resolving

test/codegen/expect/sunflower/dom.js

Index: test/codegen/expect/sunflower/dom.js
diff --git a/test/codegen/expect/sunflower/dom.js b/test/codegen/expect/sunflower/dom.js
index f267690334fd51f7a4dcb443398e25a9119225aa..accd3b1e5ea0bec03a406ba4626e23aeeb2bd8d0 100644
--- a/test/codegen/expect/sunflower/dom.js
+++ b/test/codegen/expect/sunflower/dom.js
@@ -14,6 +14,8 @@ var dom;
   let overload = new Overload();
   let EventListener = dart.typedef('EventListener', () => dart.functionType(dart.void, [Event]));
   class Event extends core.Object {}
+  let InputElement = HTMLInputElement;
+  let CanvasElement = HTMLCanvasElement;
   class RenderingContext extends core.Object {}
   class CanvasDrawingStyles extends core.Object {
     CanvasDrawingStyles() {
@@ -34,6 +36,8 @@ var dom;
   exports.overload = overload;
   exports.EventListener = EventListener;
   exports.Event = Event;
+  exports.InputElement = InputElement;
+  exports.CanvasElement = CanvasElement;
   exports.RenderingContext = RenderingContext;
   exports.CanvasDrawingStyles = CanvasDrawingStyles;
   exports.CanvasPathMethods = CanvasPathMethods;