From dc1914ba3dc09ab7c17a9ea6e4213ed424cc3539 Mon Sep 17 00:00:00 2001
From: Martin Robinson <mrobinson@igalia.com>
Date: Wed, 9 May 2018 14:09:33 +0200
Subject: [PATCH] Generate a frame when a transaction scrolls

This no longer happens automatically in WebRender, so we must do it
manually.

Fixes #20762.
---
 components/compositing/compositor.rs | 1 +
 1 file changed, 1 insertion(+)

diff --git a/components/compositing/compositor.rs b/components/compositing/compositor.rs
index 3989ed5e000..127b51c0189 100644
--- a/components/compositing/compositor.rs
+++ b/components/compositing/compositor.rs
@@ -937,6 +937,7 @@ impl<Window: WindowMethods> IOCompositor<Window> {
             let cursor = webrender_api::WorldPoint::from_untyped(&cursor);
             let mut txn = webrender_api::Transaction::new();
             txn.scroll(scroll_location, cursor);
+            txn.generate_frame();
             self.webrender_api.send_transaction(self.webrender_document, txn);
             self.waiting_for_results_of_scroll = true
         }