From 333afb61f6edbc86966aa98e09bed36f00ca653c Mon Sep 17 00:00:00 2001
From: Cameron McCormack <cam@mcc.id.au>
Date: Wed, 12 Oct 2016 15:44:44 +0800
Subject: [PATCH] Use UrlExtraData::make_from to avoid manually cloning the
 ParserContextExtraData contents.

MozReview-Commit-ID: FoCmI6swp5Q
---
 components/style/properties/longhand/box.mako.rs | 13 ++-----------
 1 file changed, 2 insertions(+), 11 deletions(-)

diff --git a/components/style/properties/longhand/box.mako.rs b/components/style/properties/longhand/box.mako.rs
index 378cd88bc45..45e64f88f7c 100644
--- a/components/style/properties/longhand/box.mako.rs
+++ b/components/style/properties/longhand/box.mako.rs
@@ -968,17 +968,8 @@ ${helpers.single_keyword("-moz-appearance",
         }
 
         let url = context.parse_url(&*try!(input.expect_url()));
-        match context.extra_data {
-            ParserContextExtraData {
-                base: Some(ref base),
-                referrer: Some(ref referrer),
-                principal: Some(ref principal),
-            } => {
-                let extra_data = UrlExtraData {
-                    base: base.clone(),
-                    referrer: referrer.clone(),
-                    principal: principal.clone(),
-                };
+        match UrlExtraData::make_from(context) {
+            Some(extra_data) => {
                 Ok(SpecifiedValue::Url(url, extra_data))
             },
             _ => {