[MD settings] merge polymer 1.0.11; hack for settings checkbox

third_party/polymer/v1_0/components-chromium/iron-selector/iron-selectable-extracted.js

-
-
-  /** @polymerBehavior */
+/** @polymerBehavior */
   Polymer.IronSelectableBehavior = {
 
     properties: {
 
       /**
        * If you want to use the attribute value of an element for `selected` instead of the index,
        * set this to the name of the attribute.
        *
        * @attribute attrForSelected
        * @type {string}
@@ skipping 269 matching lines @@
       }
     },
 
     _itemActivate: function(value, item) {
       if (!this.fire('iron-activate',
           {selected: value, item: item}, {cancelable: true}).defaultPrevented) {
         this.select(value);
       }
     }
 
-  };
-
+  };