From a5436e9091e4eb4e781db1f6442f313966a87183 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Emilio=20Cobos=20=C3=81lvarez?= <emilio@crisal.io>
Date: Sun, 26 Mar 2017 18:11:02 +0200
Subject: [PATCH] style: Add <keyword>::from_ident helper to avoid tokenizing
 the same value multiple times.

---
 components/style_traits/values.rs | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/components/style_traits/values.rs b/components/style_traits/values.rs
index c06652d06db..a142f3bab48 100644
--- a/components/style_traits/values.rs
+++ b/components/style_traits/values.rs
@@ -117,7 +117,12 @@ macro_rules! __define_css_keyword_enum__actual {
             /// Parse this property from a CSS input stream.
             pub fn parse(input: &mut ::cssparser::Parser) -> Result<$name, ()> {
                 let ident = input.expect_ident()?;
-                match_ignore_ascii_case! { &ident,
+                Self::from_ident(&ident)
+            }
+
+            /// Parse this property from an already-tokenized identifier.
+            pub fn from_ident(ident: &str) -> Result<$name, ()> {
+                match_ignore_ascii_case! { ident,
                                            $( $css => Ok($name::$variant), )+
                                            _ => Err(())
                 }