Move util::str to style

tests/unit/style/lib.rs

@@ -21,6 +21,7 @@ mod attr;
 mod logical_geometry;
 mod media_queries;
 mod properties;
+mod str;
 mod stylesheets;
 mod viewport;
 

tests/unit/style/str.rs

@@ -2,7 +2,7 @@
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
-use util::str::{split_html_space_chars, str_join};
+use style::str::{split_html_space_chars, str_join};
 
 #[test]
 pub fn split_html_space_chars_whitespace() {

tests/unit/util/lib.rs

@@ -9,5 +9,4 @@ extern crate util;
 mod cache;
 mod opts;
 mod prefs;
-mod str;
 mod thread;