Rename Root<T> to DomRoot<T>

In a later PR, DomRoot<T> will become a type alias of Root<Dom<T>>,
where Root<T> will be able to handle all the things that need to be
rooted that have a stable traceable address that doesn't move for the
whole lifetime of the root. Stay tuned.

components/script/dom/customevent.rs

@@ -8,7 +8,7 @@ use dom::bindings::codegen::Bindings::EventBinding::EventMethods;
 use dom::bindings::error::Fallible;
 use dom::bindings::inheritance::Castable;
 use dom::bindings::reflector::reflect_dom_object;
-use dom::bindings::root::Root;
+use dom::bindings::root::DomRoot;
 use dom::bindings::str::DOMString;
 use dom::bindings::trace::RootedTraceableBox;
 use dom::event::Event;
@@ -34,7 +34,7 @@ impl CustomEvent {
         }
     }
 
-    pub fn new_uninitialized(global: &GlobalScope) -> Root<CustomEvent> {
+    pub fn new_uninitialized(global: &GlobalScope) -> DomRoot<CustomEvent> {
         reflect_dom_object(box CustomEvent::new_inherited(),
                            global,
                            CustomEventBinding::Wrap)
@@ -44,7 +44,7 @@ impl CustomEvent {
                bubbles: bool,
                cancelable: bool,
                detail: HandleValue)
-               -> Root<CustomEvent> {
+               -> DomRoot<CustomEvent> {
         let ev = CustomEvent::new_uninitialized(global);
         ev.init_custom_event(type_, bubbles, cancelable, detail);
         ev
@@ -54,7 +54,7 @@ impl CustomEvent {
     pub fn Constructor(global: &GlobalScope,
                        type_: DOMString,
                        init: RootedTraceableBox<CustomEventBinding::CustomEventInit>)
-                       -> Fallible<Root<CustomEvent>> {
+                       -> Fallible<DomRoot<CustomEvent>> {
         Ok(CustomEvent::new(global,
                             Atom::from(type_),
                             init.parent.bubbles,