From 9d679c9b205b9de9f8213131432848f54213ecf1 Mon Sep 17 00:00:00 2001
From: Gerald Squelart <gsquelart@mozilla.com>
Date: Thu, 31 May 2018 18:22:48 +1000
Subject: [PATCH] style: Ignore case in media feature names inside media query
 expressions.

Media feature names are converted to lower case before being processed, making
them effectively case-insensitive.
Prefixes ("min-", etc.) and values are already treated in a case-insensitive
manner.

Bug: 1464091
Reviewed-by: heycam
MozReview-Commit-ID: JUeeEQEMIi4
---
 components/style/gecko/media_queries.rs | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/components/style/gecko/media_queries.rs b/components/style/gecko/media_queries.rs
index 554606bb9db..833db60a037 100644
--- a/components/style/gecko/media_queries.rs
+++ b/components/style/gecko/media_queries.rs
@@ -23,7 +23,7 @@ use properties::ComputedValues;
 use servo_arc::Arc;
 use std::fmt::{self, Write};
 use std::sync::atomic::{AtomicBool, AtomicIsize, AtomicUsize, Ordering};
-use str::starts_with_ignore_ascii_case;
+use str::{starts_with_ignore_ascii_case, string_as_ascii_lowercase};
 use string_cache::Atom;
 use style_traits::{CSSPixel, CssWriter, DevicePixel};
 use style_traits::{ParseError, StyleParseErrorKind, ToCss};
@@ -596,7 +596,7 @@ impl Expression {
                         Range::Equal
                     };
 
-                    let atom = Atom::from(feature_name);
+                    let atom = Atom::from(string_as_ascii_lowercase(feature_name));
                     match find_feature(|f| atom.as_ptr() == unsafe { *f.mName as *mut _ }) {
                         Some(f) => Ok((f, range)),
                         None => Err(()),