PDF: Replace usage of i18nTemplate with Polymer data binding

chrome/browser/resources/pdf/elements/viewer-pdf-toolbar/viewer-pdf-toolbar.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.
 (function() {
   Polymer({
     is: 'viewer-pdf-toolbar',
 
     behaviors: [
       Polymer.NeonAnimationRunnerBehavior
     ],
@@ skipping 31 matching lines @@
       docLength: Number,
 
       /**
        * Whether the toolbar is opened and visible.
        */
       opened: {
         type: Boolean,
         value: true
       },
 
+      strings: Object,
+
       animationConfig: {
         value: function() {
           return {
             'entry': {
               name: 'transform-animation',
               node: this,
               transformFrom: 'translateY(-100%)',
               transformTo: 'translateY(0%)',
               timing: {
                 easing: 'cubic-bezier(0, 0, 0.2, 1)',
@@ skipping 73 matching lines @@
 
     download: function() {
       this.fire('save');
     },
 
     print: function() {
       this.fire('print');
     }
   });
 })();