PDF: Replace usage of i18nTemplate with Polymer data binding

chrome/browser/resources/pdf/elements/viewer-zoom-toolbar/viewer-zoom-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() {
 
   var FIT_TO_PAGE = 0;
   var FIT_TO_WIDTH = 1;
 
   Polymer({
     is: 'viewer-zoom-toolbar',
 
     properties: {
+      strings: {
+        type: Object,
+        observer: 'updateTooltips_'
+      },
+
       visible_: {
         type: Boolean,
         value: true
       }
     },
 
     isVisible: function() {
       return this.visible_;
     },
 
     /**
      * Change button tooltips to match any changes to loadTimeData.

[raymes, 2016/07/12 05:21:49]

is this comment still accurate?

[tsergeant, 2016/07/12 06:11:39]

Not quite, I've tweaked it to reflect the changes.

      */
-    updateTooltips: function() {
+    updateTooltips_: function() {
       this.$['fit-button'].tooltips = [
-          loadTimeData.getString('tooltipFitToPage'),
-          loadTimeData.getString('tooltipFitToWidth')
+          this.strings.tooltipFitToPage,
+          this.strings.tooltipFitToWidth
       ];
-      this.$['zoom-in-button'].tooltips =
-          [loadTimeData.getString('tooltipZoomIn')];
-      this.$['zoom-out-button'].tooltips =
-          [loadTimeData.getString('tooltipZoomOut')];
+      this.$['zoom-in-button'].tooltips = [this.strings.tooltipZoomIn];
+      this.$['zoom-out-button'].tooltips = [this.strings.tooltipZoomOut];
     },
 
     fitToggle: function() {
       if (this.$['fit-button'].activeIndex == FIT_TO_WIDTH)
         this.fire('fit-to-width');
       else
         this.fire('fit-to-page');
     },
 
     zoomIn: function() {
@@ skipping 17 matching lines @@
       if (this.visible_) {
         this.visible_ = false;
         this.$['fit-button'].hide();
         this.$['zoom-in-button'].hide();
         this.$['zoom-out-button'].hide();
       }
     },
   });
 
 })();