Sky events should be in dips rather than ddpxs

sky/viewer/document_view.cc

Index: sky/viewer/document_view.cc
diff --git a/sky/viewer/document_view.cc b/sky/viewer/document_view.cc
index 83011748a556922fe88576742704660ae8dc51ea..0e26a4c0bb6ed8a82908fc483e8c10282249715d 100644
--- a/sky/viewer/document_view.cc
+++ b/sky/viewer/document_view.cc
@@ -273,7 +273,7 @@ void DocumentView::OnViewDestroyed(mojo::View* view) {
 void DocumentView::OnViewInputEvent(
     mojo::View* view, const mojo::EventPtr& event) {
   scoped_ptr<blink::WebInputEvent> web_event =
-      event.To<scoped_ptr<blink::WebInputEvent> >();
+      ConvertEvent(event, GetDevicePixelRatio());
   if (web_event)
     web_view_->handleInputEvent(*web_event);
 }