Update bower.json for Polymer elements and add PRESUBMIT.py

third_party/polymer/v1_0/components/paper-radio-group/paper-radio-group.html

Index: third_party/polymer/v1_0/components/paper-radio-group/paper-radio-group.html
diff --git a/third_party/polymer/v1_0/components/paper-radio-group/paper-radio-group.html b/third_party/polymer/v1_0/components/paper-radio-group/paper-radio-group.html
index d28b6d7fec475dd5c26ba6c1da802a92c73b929b..93088923c2a3b4d0eea4a58790743a6d33651ffe 100644
--- a/third_party/polymer/v1_0/components/paper-radio-group/paper-radio-group.html
+++ b/third_party/polymer/v1_0/components/paper-radio-group/paper-radio-group.html
@@ -22,9 +22,9 @@ previously checked radio button within the same group. Use
 Example:
 
     <paper-radio-group selected="small">
-      <paper-radio-button name="small" label="Small"></paper-radio-button>
-      <paper-radio-button name="medium" label="Medium"></paper-radio-button>
-      <paper-radio-button name="large" label="Large"></paper-radio-button>
+      <paper-radio-button name="small">Small</paper-radio-button>
+      <paper-radio-button name="medium">Medium</paper-radio-button>
+      <paper-radio-button name="large">Large</paper-radio-button>
     </paper-radio-group>
 
 See <a href="paper-radio-button.html">paper-radio-button</a> for more
@@ -82,6 +82,14 @@ information about `paper-radio-button`.
       selectedAttribute: {
         type: String,
         value: 'checked'
+      },
+
+      /**
+       * Overriden from Polymer.IronSelectableBehavior
+       */
+      selectable: {
+        type: String,
+        value: 'paper-radio-button'
       }
     },
 
@@ -128,7 +136,7 @@ information about `paper-radio-button`.
 
     /**
      * Selects the next item. If the next item is disabled, then it is
-     * skipped, and its nexy item is selected
+     * skipped, and the next item after it is selected.
      */
     selectNext: function() {
       var length = this.items.length;