[mdv] implement Node.createBinding and Node.createBindings

sdk/lib/html/dartium/html_dartium.dart

Index: sdk/lib/html/dartium/html_dartium.dart
diff --git a/sdk/lib/html/dartium/html_dartium.dart b/sdk/lib/html/dartium/html_dartium.dart
index f817506bd27c1a42ca959f8c97d8cc07ecb9531c..c85269dcce0d15ebf9c5ded6bd2aa4d92737e7f0 100644
--- a/sdk/lib/html/dartium/html_dartium.dart
+++ b/sdk/lib/html/dartium/html_dartium.dart
@@ -17880,6 +17880,7 @@ class TemplateInstance {
   TemplateInstance(this.firstNode, this.lastNode, this.model);
 }
 
+
 @DomName('Node')
 class Node extends EventTarget {
   List<Node> get nodes {
@@ -17953,14 +17954,28 @@ class Node extends EventTarget {
    */
   String toString() => nodeValue == null ? super.toString() : nodeValue;
 
+
+  /**
+   * Creates a binding to the attribute [name] to the [path] of the [model].
+   *
+   * This can be overridden by custom elements to provide the binding used in
+   * [Node.bind]. This will only create the binding; it will not add it to
+   * [bindings].
+   *
+   * You should not need to call this directly except from [Node.bind].
+   */
+  @Experimental()
+  createBinding(String name, model, String path) =>
+      TemplateElement.mdvPackage(this).createBinding(name, model, path);
+
   /**
    * Binds the attribute [name] to the [path] of the [model].
    * Path is a String of accessors such as `foo.bar.baz`.
+   * Returns the `NodeBinding` instance.
    */
   @Experimental()
-  void bind(String name, model, String path) {
-    TemplateElement.mdvPackage(this).bind(name, model, path);
-  }
+  bind(String name, model, String path) =>
+      TemplateElement.mdvPackage(this).bind(name, model, path);
 
   /** Unbinds the attribute [name]. */
   @Experimental()
@@ -17974,6 +17989,11 @@ class Node extends EventTarget {
     TemplateElement.mdvPackage(this).unbindAll();
   }
 
+  /** Gets the data bindings that are associated with this node. */
+  @Experimental()
+  Map<String, dynamic> get bindings =>
+      TemplateElement.mdvPackage(this).bindings;
+
   /** Gets the template instance that instantiated this node, if any. */
   @Experimental()
   TemplateInstance get templateInstance =>