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/webgluniformlocation.rs

@@ -6,7 +6,7 @@
 use canvas_traits::webgl::WebGLProgramId;
 use dom::bindings::codegen::Bindings::WebGLUniformLocationBinding;
 use dom::bindings::reflector::{Reflector, reflect_dom_object};
-use dom::bindings::root::Root;
+use dom::bindings::root::DomRoot;
 use dom::window::Window;
 use dom_struct::dom_struct;
 
@@ -31,7 +31,7 @@ impl WebGLUniformLocation {
     pub fn new(window: &Window,
                id: i32,
                program_id: WebGLProgramId)
-               -> Root<WebGLUniformLocation> {
+               -> DomRoot<WebGLUniformLocation> {
         reflect_dom_object(box WebGLUniformLocation::new_inherited(id, program_id),
                            window,
                            WebGLUniformLocationBinding::Wrap)