auto merge of #3757 : brunoabinader/servo/content_changed, r=jdm

```JSRef<Attr>``` does not require allocating a ```DOMString``` for value, which are unused in most cases. It also provides more access to ```Attr``` data.

1 files changed, 11 insertions, 6 deletions

diff --git a/components/script/dom/htmlobjectelement.rs b/components/script/dom/htmlobjectelement.rs
index 4e4789ea3cc..18fad7a0fcc 100644
--- a/components/script/dom/htmlobjectelement.rs
+++ b/components/script/dom/htmlobjectelement.rs
@@ -2,6 +2,8 @@
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
+use dom::attr::Attr;
+use dom::attr::AttrHelpers;
 use dom::bindings::codegen::Bindings::AttrBinding::AttrMethods;
 use dom::bindings::codegen::Bindings::HTMLObjectElementBinding;
 use dom::bindings::codegen::Bindings::HTMLObjectElementBinding::HTMLObjectElementMethods;
@@ -99,15 +101,18 @@ impl<'a> VirtualMethods for JSRef<'a, HTMLObjectElement> {
         Some(htmlelement as &VirtualMethods)
     }
 
-    fn after_set_attr(&self, name: &Atom, value: DOMString) {
+    fn after_set_attr(&self, attr: JSRef<Attr>) {
         match self.super_type() {
-            Some(ref s) => s.after_set_attr(name, value),
-            _ => (),
+            Some(ref s) => s.after_set_attr(attr),
+            _ => ()
         }
 
-        if "data" == name.as_slice() {
-            let window = window_from_node(*self).root();
-            self.process_data_url(window.image_cache_task().clone());
+        match attr.local_name() {
+            &atom!("data") => {
+                let window = window_from_node(*self).root();
+                self.process_data_url(window.image_cache_task().clone());
+            },
+            _ => ()
         }
     }
 }