MD Downloads: replace <paper-icon-button> with <inky-text-button>

chrome/browser/resources/md_downloads/item.js

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 cr.define('downloads', function() {
+  var InkyTextButton = Polymer({
+    is: 'inky-text-button',
+
+    behaviors: [
+      Polymer.PaperInkyFocusBehavior
+    ],
+
+    hostAttributes: {
+      role: 'button',
+      tabindex: 0,
+    },
+  });
+
   var Item = Polymer({
     is: 'downloads-item',
 
     properties: {
       data: {
         type: Object,
       },
 
       hideDate: {
         type: Boolean,
@@ skipping 296 matching lines @@
     onSaveDangerousTap_: function() {
       downloads.ActionService.getInstance().saveDangerous(this.data.id);
     },
 
     /** @private */
     onShowTap_: function() {
       downloads.ActionService.getInstance().show(this.data.id);
     },
   });
 
-  return {Item: Item};
+  return {
+    InkyTextButton: InkyTextButton,
+    Item: Item,
+  };
 });