From c7e25003111166cfe55d663bdf44ac112eac2dc6 Mon Sep 17 00:00:00 2001
From: Cameron McCormack <cam@mcc.id.au>
Date: Wed, 7 Jun 2017 12:27:26 +0800
Subject: [PATCH] style: Note :lang() as being sensitive to attributes.

---
 components/style/gecko/selector_parser.rs | 3 ++-
 components/style/servo/selector_parser.rs | 2 +-
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/components/style/gecko/selector_parser.rs b/components/style/gecko/selector_parser.rs
index 26921f9a41b7..54beb4a40911 100644
--- a/components/style/gecko/selector_parser.rs
+++ b/components/style/gecko/selector_parser.rs
@@ -215,7 +215,8 @@ impl NonTSPseudoClass {
     pub fn is_attr_based(&self) -> bool {
         matches!(*self,
                  NonTSPseudoClass::MozTableBorderNonzero |
-                 NonTSPseudoClass::MozBrowserFrame)
+                 NonTSPseudoClass::MozBrowserFrame |
+                 NonTSPseudoClass::Lang(..))
     }
 }
 
diff --git a/components/style/servo/selector_parser.rs b/components/style/servo/selector_parser.rs
index 0e18761a027c..b754a35462d5 100644
--- a/components/style/servo/selector_parser.rs
+++ b/components/style/servo/selector_parser.rs
@@ -276,7 +276,7 @@ impl NonTSPseudoClass {
     /// Returns true if the evaluation of the pseudo-class depends on the
     /// element's attributes.
     pub fn is_attr_based(&self) -> bool {
-        false
+        matches!(*self, NonTSPseudoClass::Lang(..))
     }
 }