From 47124e17874e26f337f8796e0e77275f2650d9e9 Mon Sep 17 00:00:00 2001
From: Hiroyuki Ikezoe <hikezoe@mozilla.com>
Date: Wed, 31 May 2017 05:48:56 +0900
Subject: [PATCH] Don't process visited rules during animation-only restyle.

---
 components/style/matching.rs | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/components/style/matching.rs b/components/style/matching.rs
index caef1c0c7ba..539f591cac5 100644
--- a/components/style/matching.rs
+++ b/components/style/matching.rs
@@ -1254,8 +1254,10 @@ pub trait MatchMethods : TElement {
         let mut result = false;
         result |= self.replace_rules_internal(replacements, context, data,
                                               CascadeVisitedMode::Unvisited);
-        result |= self.replace_rules_internal(replacements, context, data,
-                                              CascadeVisitedMode::Visited);
+        if !context.shared.traversal_flags.for_animation_only() {
+            result |= self.replace_rules_internal(replacements, context, data,
+                                                  CascadeVisitedMode::Visited);
+        }
         result
     }