Auto merge of #6596 - pcwalton:layout-control-ipc, r=jdm

compositing: Make `ScriptListener` and `LayoutControlChan` messages go over IPC.

r? @jdm

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components/script/dom/bindings/trace.rs

@@ -328,7 +328,7 @@ impl<A,B> JSTraceable for fn(A) -> B {
     }
 }
 
-impl JSTraceable for Box<ScriptListener+'static> {
+impl JSTraceable for ScriptListener {
     #[inline]
     fn trace(&self, _: *mut JSTracer) {
         // Do nothing

components/script/dom/document.rs

@@ -251,8 +251,11 @@ pub trait DocumentHelpers<'a> {
     fn title_changed(self);
     fn send_title_to_compositor(self);
     fn dirty_all_nodes(self);
-    fn dispatch_key_event(self, key: Key, state: KeyState,
-        modifiers: KeyModifiers, compositor: &mut Box<ScriptListener+'static>);
+    fn dispatch_key_event(self,
+                          key: Key,
+                          state: KeyState,
+                          modifiers: KeyModifiers,
+                          compositor: &mut ScriptListener);
     fn node_from_nodes_and_strings(self, nodes: Vec<NodeOrString>)
                                    -> Fallible<Root<Node>>;
     fn get_body_attribute(self, local_name: &Atom) -> DOMString;
@@ -760,10 +763,11 @@ impl<'a> DocumentHelpers<'a> for &'a Document {
     }
 
     /// The entry point for all key processing for web content
-    fn dispatch_key_event(self, key: Key,
+    fn dispatch_key_event(self,
+                          key: Key,
                           state: KeyState,
                           modifiers: KeyModifiers,
-                          compositor: &mut Box<ScriptListener+'static>) {
+                          compositor: &mut ScriptListener) {
         let window = self.window.root();
         let focused = self.get_focused_element();
         let body = self.GetBody();

components/script/dom/window.rs

@@ -105,7 +105,7 @@ pub struct Window {
     navigator: MutNullableHeap<JS<Navigator>>,
     image_cache_task: ImageCacheTask,
     image_cache_chan: ImageCacheChan,
-    compositor: DOMRefCell<Box<ScriptListener+'static>>,
+    compositor: DOMRefCell<ScriptListener>,
     browser_context: DOMRefCell<Option<BrowserContext>>,
     page: Rc<Page>,
     performance: MutNullableHeap<JS<Performance>>,
@@ -241,7 +241,7 @@ impl Window {
         &self.image_cache_task
     }
 
-    pub fn compositor<'a>(&'a self) -> RefMut<'a, Box<ScriptListener+'static>> {
+    pub fn compositor<'a>(&'a self) -> RefMut<'a, ScriptListener> {
         self.compositor.borrow_mut()
     }
 
@@ -964,7 +964,7 @@ impl Window {
                script_chan: Box<ScriptChan+Send>,
                image_cache_chan: ImageCacheChan,
                control_chan: ScriptControlChan,
-               compositor: Box<ScriptListener+'static>,
+               compositor: ScriptListener,
                image_cache_task: ImageCacheTask,
                resource_task: ResourceTask,
                storage_task: StorageTask,