Change ToCss to take a CssWriter<W>

This more concrete wrapper type can write a prefix the very first time something
is written to it. This allows removing plenty of useless monomorphisations caused
by the former W/SequenceWriter<W> pair of types.

1 files changed, 2 insertions, 2 deletions

diff --git a/components/style/selector_parser.rs b/components/style/selector_parser.rs
index 54978d284b7..e68aded1c9a 100644
--- a/components/style/selector_parser.rs
+++ b/components/style/selector_parser.rs
@@ -9,7 +9,7 @@
 use cssparser::{Parser as CssParser, ParserInput};
 use selectors::parser::SelectorList;
 use std::fmt::{self, Debug, Write};
-use style_traits::{ParseError, ToCss};
+use style_traits::{CssWriter, ParseError, ToCss};
 use stylesheets::{Origin, Namespaces, UrlExtraData};
 
 /// A convenient alias for the type that represents an attribute value used for
@@ -201,7 +201,7 @@ impl Direction {
 }
 
 impl ToCss for Direction {
-    fn to_css<W>(&self, dest: &mut W) -> fmt::Result where W: Write {
+    fn to_css<W>(&self, dest: &mut CssWriter<W>) -> fmt::Result where W: Write {
         let dir_str = match *self {
             Direction::Rtl => "rtl",
             Direction::Ltr => "ltr",