Rename the 'unstable' feature of the selectors crate to 'bench'

components/selectors/Cargo.toml

@@ -20,7 +20,7 @@ doctest = false
 
 [features]
 gecko_like_types = []
-unstable = []
+bench = []
 
 [dependencies]
 bitflags = "0.7"

components/selectors/bloom.rs

@@ -346,7 +346,7 @@ fn create_and_insert_some_stuff() {
     }
 }
 
-#[cfg(feature = "unstable")]
+#[cfg(feature = "bench")]
 #[cfg(test)]
 mod bench {
     extern crate test;

components/selectors/lib.rs

@@ -3,7 +3,7 @@
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
 // Make |cargo bench| work.
-#![cfg_attr(feature = "unstable", feature(test))]
+#![cfg_attr(feature = "bench", feature(test))]
 
 #[macro_use] extern crate bitflags;
 #[macro_use] extern crate cssparser;