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

third_party/polymer/v1_0/components/paper-icon-button/paper-icon-button.html

 <!--
 @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
 The complete set of authors may be found at http://polymer.github.io/AUTHORS
 The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS
 Code distributed by Google as part of the polymer project is also
 subject to an additional IP rights grant found at http://polymer.github.io/PATENTS
 -->
 
@@ skipping 59 matching lines @@
 -->
 
 <dom-module id="paper-icon-button">
   <style>
 
     :host {
       display: inline-block;
       position: relative;
       padding: 8px;
       outline: none;
+      -webkit-tap-highlight-color: rgba(0,0,0,0);
       -webkit-user-select: none;
       -moz-user-select: none;
       -ms-user-select: none;
       user-select: none;
       cursor: pointer;
       z-index: 0;
 
       @apply(--paper-icon-button);
     }
 
@@ skipping 57 matching lines @@
     _altChanged: function(newValue, oldValue) {
       var label = this.getAttribute('aria-label');
 
       // Don't stomp over a user-set aria-label.
       if (!label || oldValue == label) {
         this.setAttribute('aria-label', newValue);
       }
     }
   });
 </script>