Add fling support to sky-drawer

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 6c8892ba7e98c5e9c33963dd1cceda15ffdafe60..47192519fc9a209c62933363e18222cbde2d2c76 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;
-      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;
+      // 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;
       break;
     case mojo::EVENT_TYPE_SCROLL_FLING_CANCEL:
       web_event->type = blink::WebInputEvent::GestureFlingCancel;