Auto merge of #8786 - eefriedman:localname-atom, r=jdm

Remove unnecessary conversion to/from DOMString for localName.

<!-- Reviewable:start -->
[<img src="https://reviewable.io/review_button.png" height=40 alt="Review on Reviewable"/>](https://reviewable.io/reviews/servo/servo/8786)
<!-- Reviewable:end -->

1 files changed, 3 insertions, 2 deletions

diff --git a/components/script/dom/htmlbrelement.rs b/components/script/dom/htmlbrelement.rs
index 3007e772515..e9b31954f9f 100644
--- a/components/script/dom/htmlbrelement.rs
+++ b/components/script/dom/htmlbrelement.rs
@@ -7,6 +7,7 @@ use dom::bindings::js::Root;
 use dom::document::Document;
 use dom::htmlelement::HTMLElement;
 use dom::node::Node;
+use string_cache::Atom;
 use util::str::DOMString;
 
 #[dom_struct]
@@ -15,14 +16,14 @@ pub struct HTMLBRElement {
 }
 
 impl HTMLBRElement {
-    fn new_inherited(localName: DOMString, prefix: Option<DOMString>, document: &Document) -> HTMLBRElement {
+    fn new_inherited(localName: Atom, prefix: Option<DOMString>, document: &Document) -> HTMLBRElement {
         HTMLBRElement {
             htmlelement: HTMLElement::new_inherited(localName, prefix, document)
         }
     }
 
     #[allow(unrooted_must_root)]
-    pub fn new(localName: DOMString,
+    pub fn new(localName: Atom,
                prefix: Option<DOMString>,
                document: &Document) -> Root<HTMLBRElement> {
         let element = HTMLBRElement::new_inherited(localName, prefix, document);