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

third_party/polymer/v1_0/components/paper-input/paper-input-error.html

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 @license
 Copyright (c) 2015 The Polymer Project Authors. All rights reserved.
 This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
 The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
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@@ skipping 17 matching lines @@
 Custom property | Description | Default
 ----------------|-------------|----------
 `--paper-input-container-invalid-color` | The foreground color of the error | `--google-red-500`
 `--paper-input-error`                   | Mixin applied to the error        | `{}`
 -->
 <dom-module id="paper-input-error">
 
   <style>
 
     :host {
-      /* need to use display: none for role="alert" */
-      display: none;
+      display: inline-block;
+      visibility: hidden;
       float: left;
 
       color: var(--paper-input-container-invalid-color, --google-red-500);
 
       @apply(--paper-font-caption);
       @apply(--paper-input-error);
     }
 
     :host([invalid]) {
-      display: inline-block;
+      visibility: visible;
     };
 
   </style>
 
   <template>
 
     <content></content>
 
   </template>
 
 </dom-module>
 
 <script>
 
 (function() {
 
   Polymer({
 
     is: 'paper-input-error',
 
     behaviors: [
       Polymer.PaperInputAddonBehavior
     ],
 
-    hostAttributes: {
-      'role': 'alert'
-    },
-
     properties: {
 
       /**
        * True if the error is showing.
        */
       invalid: {
         readOnly: true,
         reflectToAttribute: true,
         type: Boolean
       }
 
     },
 
     update: function(state) {
       this._setInvalid(state.invalid);
     }
 
   })
 
 })();
 
 </script>