Split Au type into separate crate, with minimal dependencies.

tests/unit/style/Cargo.toml

@@ -8,6 +8,9 @@ name = "style_tests"
 path = "lib.rs"
 doctest = false
 
+[dependencies.app_units]
+path = "../../../components/app_units"
+
 [dependencies.style]
 path = "../../../components/style"
 

tests/unit/style/lib.rs

@@ -5,6 +5,7 @@
 #![feature(plugin)]
 #![plugin(string_cache_plugin)]
 
+extern crate app_units;
 extern crate cssparser;
 extern crate euclid;
 extern crate selectors;

tests/unit/style/media_queries.rs

@@ -2,13 +2,13 @@
  * 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 app_units::Au;
 use euclid::size::Size2D;
 use std::borrow::ToOwned;
 use style::media_queries::*;
 use style::stylesheets::{Origin, Stylesheet, CSSRuleIteratorExt};
 use style::values::specified;
 use url::Url;
-use util::geometry::Au;
 
 
 fn test_media_rule<F>(css: &str, callback: F) where F: Fn(&MediaQueryList, &str) {