PDF: Replace usage of i18nTemplate with Polymer data binding

chrome/browser/resources/pdf/elements/viewer-error-screen/viewer-error-screen.js

 // Copyright 2014 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.
 
 Polymer({
   is: 'viewer-error-screen',
   properties: {
     reloadFn: {
       type: Object,
       value: null,
       observer: 'reloadFnChanged_'
-    }
+    },
+
+    strings: Object,
   },
 
   reloadFnChanged_: function() {
     // The default margins in paper-dialog don't work well with hiding/showing
     // the .buttons div. We need to manually manage the bottom margin to get
     // around this.
     if (this.reloadFn)
       this.$['load-failed-message'].classList.remove('last-item');
     else
       this.$['load-failed-message'].classList.add('last-item');
   },
 
   show: function() {
     this.$.dialog.open();
   },
 
   reload: function() {
     if (this.reloadFn)
       this.reloadFn();
   }
 });