Stop using int/uint in compositing.

components/compositing/compositor_layer.rs

@@ -49,7 +49,7 @@ pub struct CompositorData {
 impl CompositorData {
     pub fn new_layer(layer_properties: LayerProperties,
                      wants_scroll_events: WantsScrollEventsFlag,
-                     tile_size: uint)
+                     tile_size: usize)
                      -> Rc<Layer<CompositorData>> {
         let new_compositor_data = CompositorData {
             pipeline_id: layer_properties.pipeline_id,

components/compositing/lib.rs

@@ -4,7 +4,6 @@
 
 #![feature(box_syntax)]
 #![feature(core)]
-#![feature(int_uint)]
 #![feature(io)]
 #![feature(old_io)]
 #![feature(rustc_private)]