Mark fn2's EventListenerNode work for PointerEvent

sky/sdk/lib/framework/app.dart

Index: sky/sdk/lib/framework/app.dart
diff --git a/sky/sdk/lib/framework/app.dart b/sky/sdk/lib/framework/app.dart
index 151791b51884f54d5f22ff27998a018645f84324..89b5fed7684ec624275101d751acaad4dfcd4cfc 100644
--- a/sky/sdk/lib/framework/app.dart
+++ b/sky/sdk/lib/framework/app.dart
@@ -16,7 +16,8 @@ class AppView {
 
     _renderView = new RenderView(child: root);
     _renderView.attach();
-    _renderView.layout(new ViewConstraints(width: sky.view.width, height: sky.view.height));
+    _renderView.layout(new ViewConstraints(width: sky.view.width,
+                                           height: sky.view.height));
 
     scheduler.ensureVisualUpdate();
   }
@@ -61,10 +62,12 @@ class AppView {
         }
         break;
     }
+    dispatchPointerEvent(event, result);
+  }
+
+  void dispatchPointerEvent(sky.PointerEvent event, HitTestResult result) {
     assert(result != null);
-    result.path.reversed.forEach((RenderNode node) {
+    for (RenderNode node in result.path.reversed)
       node.handlePointer(event);
-    });
   }
-
 }