From 15dcd8a8ea206be2f8992a604d669ba2556b348f Mon Sep 17 00:00:00 2001
From: Anthony Ramine <n.oxyde@gmail.com>
Date: Sat, 3 Mar 2018 00:38:29 +0100
Subject: [PATCH] Derive ToCss for ViewportLength

---
 components/style/stylesheets/viewport_rule.rs | 16 ++--------------
 1 file changed, 2 insertions(+), 14 deletions(-)

diff --git a/components/style/stylesheets/viewport_rule.rs b/components/style/stylesheets/viewport_rule.rs
index 3b2c32072dd..ca45bbe7a0e 100644
--- a/components/style/stylesheets/viewport_rule.rs
+++ b/components/style/stylesheets/viewport_rule.rs
@@ -143,26 +143,14 @@ trait FromMeta: Sized {
 /// See:
 /// * http://dev.w3.org/csswg/css-device-adapt/#min-max-width-desc
 /// * http://dev.w3.org/csswg/css-device-adapt/#extend-to-zoom
-#[derive(Clone, Debug, PartialEq)]
-#[cfg_attr(feature = "servo", derive(MallocSizeOf))]
 #[allow(missing_docs)]
+#[cfg_attr(feature = "servo", derive(MallocSizeOf))]
+#[derive(Clone, Debug, PartialEq, ToCss)]
 pub enum ViewportLength {
     Specified(LengthOrPercentageOrAuto),
     ExtendToZoom
 }
 
-impl ToCss for ViewportLength {
-    fn to_css<W>(&self, dest: &mut CssWriter<W>) -> fmt::Result
-    where
-        W: Write,
-    {
-        match *self {
-            ViewportLength::Specified(ref length) => length.to_css(dest),
-            ViewportLength::ExtendToZoom => dest.write_str("extend-to-zoom"),
-        }
-    }
-}
-
 impl FromMeta for ViewportLength {
     fn from_meta(value: &str) -> Option<ViewportLength> {
         macro_rules! specified {