PDF viewer: Specify tabId when navigating with chrome.tabs.update.

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 228 matching lines @@
       this.browserApi_.getInitialZoom());
   this.viewport_.zoomManager = this.zoomManager_;
   this.browserApi_.addZoomEventListener(
       this.zoomManager_.onBrowserZoomChange.bind(this.zoomManager_));
 
   // Setup the keyboard event listener.
   document.addEventListener('keydown', this.handleKeyEvent_.bind(this));
   document.addEventListener('mousemove', this.handleMouseEvent_.bind(this));
   document.addEventListener('mouseout', this.handleMouseEvent_.bind(this));
 
-  var isInTab = this.browserApi_.getStreamInfo().tabId != -1;
+  var tabId = this.browserApi_.getStreamInfo().tabId;
   this.navigator_ = new Navigator(
       this.originalUrl_, this.viewport_, this.paramsParser_,
-      new NavigatorDelegate(isInTab));
+      new NavigatorDelegate(tabId));
   this.viewportScroller_ =
       new ViewportScroller(this.viewport_, this.plugin_, window);
 
   // Request translated strings.
   chrome.resourcesPrivate.getStrings('pdf', this.handleStrings_.bind(this));
 }
 
 PDFViewer.prototype = {
   /**
    * @private
@@ skipping 660 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_;
   }
 };