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

content/browser/renderer_host/render_widget_host_view_aura.cc

Index: content/browser/renderer_host/render_widget_host_view_aura.cc
diff --git a/content/browser/renderer_host/render_widget_host_view_aura.cc b/content/browser/renderer_host/render_widget_host_view_aura.cc
index d86e56623fd9426a5aa35f26291a36e41dfd7833..648c96f4ec40bd76615cc8f16f6afb95acb7ec19 100644
--- a/content/browser/renderer_host/render_widget_host_view_aura.cc
+++ b/content/browser/renderer_host/render_widget_host_view_aura.cc
@@ -1065,8 +1065,9 @@ void RenderWidgetHostViewAura::ProcessAckedTouchEvent(
   for (size_t i = 0; i < touch.event.touches_length; ++i) {
     if (touch.event.touches[i].state == required_state) {
       DCHECK(!sent_ack);
-      host->dispatcher()->ProcessedTouchEvent(touch.event.unique_touch_event_id,
-                                              window_, result);
+      host->dispatcher()->ProcessedTouchEvent(
+          touch.event.unique_touch_event_id, window_, result,
+          InputEventAckStateIsSetNonBlocking(ack_result));
       sent_ack = true;
     }
   }