Added TodoMVC startup benchmarks.

samples/third_party/todomvc_performance/js_todomvc/components/polymer-selection/polymer-selection.html

Index: samples/third_party/todomvc_performance/js_todomvc/components/polymer-selection/polymer-selection.html
diff --git a/samples/third_party/todomvc/web/lib-elements/polymer-selection.html b/samples/third_party/todomvc_performance/js_todomvc/components/polymer-selection/polymer-selection.html
similarity index 97%
copy from samples/third_party/todomvc/web/lib-elements/polymer-selection.html
copy to samples/third_party/todomvc_performance/js_todomvc/components/polymer-selection/polymer-selection.html
index 609ced39ded902980f4e5807a8fae2a154996f5d..d29fae49d774e0679886bbe3514e582c21398b69 100644
--- a/samples/third_party/todomvc/web/lib-elements/polymer-selection.html
+++ b/samples/third_party/todomvc_performance/js_todomvc/components/polymer-selection/polymer-selection.html
@@ -15,12 +15,12 @@ license that can be found in the LICENSE file.
  * For example, <a href="polymer-selector.html">polymer-selector</a>
  * use a polymer-selection to manage selection.
  *
- * To mark an item as selected, call the select(item) method on
+ * To mark an item as selected, call the select(item) method on 
  * polymer-selection. Notice that the item itself is an argument to this method.
  * The polymer-selection element manages selection state for any given set of
  * items. When an item is selected, the `polymer-select` event is fired.
  * The attribute "multi" indicates if multiple items can be selected at once.
- *
+ * 
  * Example:
  *
  *     <polymer-element name="selection-example">
@@ -60,13 +60,15 @@ license that can be found in the LICENSE file.
  * Fired when an item's selection state is changed. This event is fired both
  * when an item is selected or deselected. The `isSelected` detail property
  * contains the selection state.
- *
+ * 
  * @event polymer-select
  * @param {Object} detail
  *   @param {boolean} detail.isSelected true for selection and false for deselection
  *   @param {Object} detail.item the item element
  */
 -->
+<link rel="import" href="../polymer/polymer.html">
+
 <polymer-element name="polymer-selection" attributes="multi">
   <template>
     <style>
@@ -95,7 +97,7 @@ license that can be found in the LICENSE file.
        * Retrieves the selected item(s).
        * @method getSelection
        * @returns Returns the selected item(s). If the multi property is true,
-       * getSelection will return an array, otherwise it will return
+       * getSelection will return an array, otherwise it will return 
        * the selected item or undefined if there is no selection.
       */
       getSelection: function() {