PDF: Allow external navigation links in PDF bookmarks

chrome/browser/resources/pdf/pdf.js

 // Copyright 2013 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.
 
 'use strict';
 
 /**
  * @return {number} Width of a scrollbar in pixels
  */
 function getScrollbarWidth() {
@@ skipping 219 matching lines @@
         this.toolbar_.hideDropdowns.bind(this.toolbar_));
 
     this.toolbar_.docTitle =
         getFilenameFromURL(this.originalUrl_);
   }
 
   document.body.addEventListener('change-page', function(e) {
     this.viewport_.goToPage(e.detail.page);
   }.bind(this));
 
+  document.body.addEventListener('navigate', function(e) {
+    this.navigator_.navigate(e.detail.uri, e.detail.newtab);
+  }.bind(this));
+
   this.toolbarManager_ =
       new ToolbarManager(window, this.toolbar_, this.zoomToolbar_);
 
   // Set up the ZoomManager.
   this.zoomManager_ = new ZoomManager(
       this.viewport_, this.browserApi_.setZoom.bind(this.browserApi_),
       this.browserApi_.getInitialZoom());
   this.browserApi_.addZoomEventListener(
       this.zoomManager_.onBrowserZoomChange.bind(this.zoomManager_));
 
@@ skipping 624 matching lines @@
    * Each bookmark is an Object containing a:
    * - title
    * - page (optional)
    * - array of children (themselves bookmarks)
    * @type {Array} the top-level bookmarks of the PDF.
    */
   get bookmarks() {
     return this.bookmarks_;
   }
 };