Fix more warnings everywhere.

components/compositing/lib.rs

@@ -5,7 +5,8 @@
 #![feature(box_syntax)]
 #![feature(core)]
 #![feature(int_uint)]
-#![feature(io)]
+#![feature(old_io)]
+#![feature(old_path)]
 #![feature(rustc_private)]
 #![feature(std_misc)]
 

components/compositing/scrolling.rs

@@ -40,7 +40,7 @@ impl ScrollingTimerProxy {
                 receiver: to_scrolling_timer_receiver,
             };
             scrolling_timer.run();
-        });
+        }).unwrap();
         ScrollingTimerProxy {
             sender: to_scrolling_timer_sender,
         }