From ac5e7ec035c15dff66b07c03297f531a6ab31f5a Mon Sep 17 00:00:00 2001
From: Patrick Walton <pcwalton@mimiga.net>
Date: Mon, 3 Aug 2015 15:35:39 -0700
Subject: [PATCH] construct: When repairing styles for incremental reflow, only
 repair styles of nodes that represent the dirty node.

Fixes jumpiness on many pages; e.g. the WPT results pages.

For some reason, this would not reproduce with an automated test.
---
 components/layout/construct.rs | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/components/layout/construct.rs b/components/layout/construct.rs
index 89e88847a22..1bc3dfea922 100644
--- a/components/layout/construct.rs
+++ b/components/layout/construct.rs
@@ -1272,6 +1272,11 @@ impl<'a> FlowConstructor<'a> {
                 for fragment in inline_fragments_construction_result.fragments
                                                                     .fragments
                                                                     .iter_mut() {
+                    // Only mutate the styles of fragments that represent the dirty node.
+                    if fragment.node != node.opaque() {
+                        continue
+                    }
+
                     match fragment.specific {
                         SpecificFragmentInfo::InlineBlock(ref mut inline_block_fragment) => {
                             flow::mut_base(&mut *inline_block_fragment.flow_ref).restyle_damage