GRIT: put <if> and <include> behind comments in .js files to make syntactically valid JS

chrome/browser/resources/pdf/elements/viewer-page-indicator/viewer-page-indicator.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-page-indicator',
 
   properties: {
     label: {
       type: String,
@@ skipping 24 matching lines @@
   initialFadeIn: function() {
     this.fadeIn(6000);
   },
 
   fadeIn: function(displayTime) {
     var percent = window.scrollY /
         (document.body.scrollHeight -
          document.documentElement.clientHeight);
     this.style.top = percent *
         (document.documentElement.clientHeight - this.offsetHeight) + 'px';
-<if expr="is_macosx">
+// <if expr="is_macosx">
     // On the Mac, if overlay scrollbars are enabled, prevent them from
     // overlapping the triangle.
     if (window.innerWidth == document.body.scrollWidth)
       this.style.right = '16px';
     else
       this.style.right = '0px';
-</if>
+// </if>
     this.style.opacity = 1;
     clearTimeout(this.timerId);
 
     this.timerId = setTimeout(function() {
       this.style.opacity = 0;
       this.timerId = undefined;
     }.bind(this), displayTime);
   },
 
   pageLabelsChanged: function() {
     this.indexChanged();
   },
 
   indexChanged: function() {
     if (this.pageLabels)
       this.label = this.pageLabels[this.index];
     else
       this.label = String(this.index + 1);
   }
 });