Coalesce async touch move events until the ack back from render

content/renderer/input/input_event_filter.cc

Index: content/renderer/input/input_event_filter.cc
diff --git a/content/renderer/input/input_event_filter.cc b/content/renderer/input/input_event_filter.cc
index 6c78d57b0213ecbfbc1ce152e3052783e466807c..06fe19e42088680565ca6235eb9e3ab9355dad3c 100644
--- a/content/renderer/input/input_event_filter.cc
+++ b/content/renderer/input/input_event_filter.cc
@@ -152,7 +152,6 @@ void InputEventFilter::ForwardToHandler(const IPC::Message& message) {
   DCHECK(event);
 
   const bool send_ack = !WebInputEventTraits::IgnoresAckDisposition(*event);
-
   // Intercept |DidOverscroll| notifications, bundling any triggered overscroll
   // response with the input event ack.
   scoped_ptr<DidOverscrollParams> overscroll_params;