1 files changed, 8 insertions, 9 deletions
diff --git a/components/script/dom/htmlobjectelement.rs b/components/script/dom/htmlobjectelement.rs
index 884087c298d..04c5228072b 100644
--- a/components/script/dom/htmlobjectelement.rs
+++ b/components/script/dom/htmlobjectelement.rs
@@ -10,7 +10,7 @@ use dom::bindings::codegen::InheritTypes::HTMLObjectElementDerived;
 use dom::bindings::codegen::InheritTypes::{ElementCast, HTMLElementCast};
 use dom::bindings::js::Root;
 use dom::document::Document;
-use dom::element::ElementTypeId;
+use dom::element::{AttributeMutation, ElementTypeId};
 use dom::eventtarget::{EventTarget, EventTargetTypeId};
 use dom::htmlelement::{HTMLElement, HTMLElementTypeId};
 use dom::node::{Node, NodeTypeId, window_from_node};
@@ -101,16 +101,15 @@ impl VirtualMethods for HTMLObjectElement {
         Some(htmlelement as &VirtualMethods)
     }
 
-    fn after_set_attr(&self, attr: &Attr) {
-        if let Some(ref s) = self.super_type() {
-            s.after_set_attr(attr);
-        }
-
+    fn attribute_mutated(&self, attr: &Attr, mutation: AttributeMutation) {
+        self.super_type().unwrap().attribute_mutated(attr, mutation);
         match attr.local_name() {
-            &atom!("data") => {
-                self.process_data_url();
+            &atom!(data) => {
+                if let AttributeMutation::Set(_) = mutation {
+                    self.process_data_url();
+                }
             },
-            _ => ()
+            _ => {},
         }
     }
 }