Implemented Node.adoptNode

Spec:
http://dom.spec.whatwg.org/#dom-document-adoptnode

src/components/script/dom/bindings/codegen/Bindings.conf

@@ -26,6 +26,7 @@ DOMInterfaces = {
 'Console': {},
 'Document': {
     'needsAbstract': [
+        'adoptNode',
         'anchors',
         'applets',
         'body',

src/components/script/dom/document.rs

@@ -311,6 +311,21 @@ impl Document {
         Ok(Node::clone(node, Some(abstract_self), clone_children))
     }
 
+    // http://dom.spec.whatwg.org/#dom-document-adoptnode
+    pub fn AdoptNode(&self, abstract_self: &JS<Document>, node: &JS<Node>) -> Fallible<JS<Node>> {
+        // Step 1.
+        if node.is_document() {
+            return Err(NotSupported);
+        }
+
+        // Step 2.
+        let mut adoptee = node.clone();
+        Node::adopt(&mut adoptee, abstract_self);
+
+        // Step 3.
+        Ok(adoptee)
+    }
+
     // http://dom.spec.whatwg.org/#dom-document-createevent
     pub fn CreateEvent(&self, interface: DOMString) -> Fallible<JS<Event>> {
         match interface.as_slice() {

src/components/script/dom/node.rs

@@ -1016,7 +1016,7 @@ impl Node {
     }
 
     // http://dom.spec.whatwg.org/#concept-node-adopt
-    fn adopt(node: &mut JS<Node>, document: &JS<Document>) {
+    pub fn adopt(node: &mut JS<Node>, document: &JS<Document>) {
         // Step 1.
         match node.parent_node() {
             Some(ref mut parent) => Node::remove(node, parent, Unsuppressed),

src/components/script/dom/webidls/Document.webidl

@@ -38,6 +38,8 @@ interface Document : Node {
 
   [Throws]
   Node importNode(Node node, optional boolean deep = false);
+  [Throws]
+  Node adoptNode(Node node);
 
   [Creator, Throws]
   Event createEvent(DOMString interface_);