From 97c9dae40dba494fd03482d48a9a46b50aa1c407 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Emilio=20Cobos=20=C3=81lvarez?= <emilio@crisal.io>
Date: Wed, 18 Oct 2017 12:13:32 +0200
Subject: [PATCH] style: Use a proper flattened tree iterator if we're under a
 shadow tree.

---
 components/style/gecko/wrapper.rs | 1 +
 1 file changed, 1 insertion(+)

diff --git a/components/style/gecko/wrapper.rs b/components/style/gecko/wrapper.rs
index 3ba4b5d470f..908af2b6bd3 100644
--- a/components/style/gecko/wrapper.rs
+++ b/components/style/gecko/wrapper.rs
@@ -867,6 +867,7 @@ impl<'le> TElement for GeckoElement<'le> {
         // ::before/::after, XBL bindings, or nsIAnonymousContentCreators.
         if self.is_in_anonymous_subtree() ||
            self.has_xbl_binding_with_content() ||
+           self.is_in_shadow_tree() ||
            self.may_have_anonymous_children() {
             unsafe {
                 let mut iter: structs::StyleChildrenIterator = ::std::mem::zeroed();