Fix subtle bugs in sky-scrollable

sky/viewer/converters/input_event_types.cc

Index: sky/viewer/converters/input_event_types.cc
diff --git a/sky/viewer/converters/input_event_types.cc b/sky/viewer/converters/input_event_types.cc
index d5bb31ed90eb15955cf17749fb99c48790871a6c..3aa297d4902b88a5da238456ce3a45059fa5cfba 100644
--- a/sky/viewer/converters/input_event_types.cc
+++ b/sky/viewer/converters/input_event_types.cc
@@ -108,10 +108,10 @@ scoped_ptr<blink::WebInputEvent> BuildWebGestureEvent(
       break;
     case mojo::EVENT_TYPE_SCROLL_FLING_START:
       web_event->type = blink::WebInputEvent::GestureFlingStart;
-      // TODO(abarth): Why don't we need to divide by the device_pixel_ratio
-      // here? For some reason, this seems to get the right velocity.
-      web_event->data.flingStart.velocityX = event->gesture_data->velocity_x;
-      web_event->data.flingStart.velocityY = event->gesture_data->velocity_y;
+      web_event->data.flingStart.velocityX =
+          event->gesture_data->velocity_x / device_pixel_ratio;
+      web_event->data.flingStart.velocityY =
+          event->gesture_data->velocity_y / device_pixel_ratio;
       break;
     case mojo::EVENT_TYPE_SCROLL_FLING_CANCEL:
       web_event->type = blink::WebInputEvent::GestureFlingCancel;