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

content/browser/renderer_host/ui_events_helper.cc

Index: content/browser/renderer_host/ui_events_helper.cc
diff --git a/content/browser/renderer_host/ui_events_helper.cc b/content/browser/renderer_host/ui_events_helper.cc
index 9bfc3bbf55d7814925470dea3aeac5b27191a05e..8ee439cbff841968a6fab204662e885d87e2eb88 100644
--- a/content/browser/renderer_host/ui_events_helper.cc
+++ b/content/browser/renderer_host/ui_events_helper.cc
@@ -90,14 +90,4 @@
   return true;
 }
 
-bool InputEventAckStateIsSetNonBlocking(InputEventAckState ack_state) {
-  switch (ack_state) {
-    case INPUT_EVENT_ACK_STATE_SET_NON_BLOCKING:
-    case INPUT_EVENT_ACK_STATE_SET_NON_BLOCKING_DUE_TO_FLING:
-      return true;
-    default:
-      return false;
-  }
-}
-
 }  // namespace content