[Android] Add a native pull-to-refresh overscroll effect

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 b514425cc883eb83852c8c22101eea58b156c162..bd66fc014422246f99017fb9f3d9ff388d09fc68 100644
--- a/content/browser/renderer_host/ui_events_helper.cc
+++ b/content/browser/renderer_host/ui_events_helper.cc
@@ -184,6 +184,8 @@ blink::WebGestureEvent MakeWebGestureEventFromUIEvent(
       gesture_event.type = blink::WebInputEvent::GestureScrollUpdate;
       gesture_event.data.scrollUpdate.deltaX = event.details().scroll_x();
       gesture_event.data.scrollUpdate.deltaY = event.details().scroll_y();
+      gesture.data.scrollUpdate.isFirstUpdate =
+          data.details.is_first_scroll_update();
       break;
     case ui::ET_GESTURE_SCROLL_END:
       gesture_event.type = blink::WebInputEvent::GestureScrollEnd;