Reland of [VSync Queue] Plug touch ack to gesture events and flush vsync queue if necessary

ui/events/blink/blink_event_util.cc

Index: ui/events/blink/blink_event_util.cc
diff --git a/ui/events/blink/blink_event_util.cc b/ui/events/blink/blink_event_util.cc
index 7dfbe2912ecc587df6f6949babb5096d4911ac07..ad6e31ae73d756d5d2abc73adc170863ccc97100 100644
--- a/ui/events/blink/blink_event_util.cc
+++ b/ui/events/blink/blink_event_util.cc
@@ -626,6 +626,9 @@
       gesture.source_device = blink::kWebGestureDeviceUninitialized;
       break;
   }
+
+  gesture.is_source_touch_event_set_non_blocking =
+      details.is_source_touch_event_set_non_blocking();
 
   gesture.unique_touch_event_id = unique_touch_event_id;