Make sure the PDF material toolbar gets hidden after loading.

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 418 matching lines @@
       // Document load failed.
       this.errorScreen_.style.visibility = 'visible';
       this.sizer_.style.display = 'none';
       if (!this.isMaterial_)
         this.toolbar_.style.visibility = 'hidden';
       if (this.passwordScreen_.active) {
         this.passwordScreen_.deny();
         this.passwordScreen_.active = false;
       }
     } else if (progress == 100) {
+      if (this.isMaterial_)
+        this.uiManager_.showUi();

[Sam McNally, 2015/03/02 02:01:01]

How about setting the initial timeout in the constructor and creating the
UiManager here? Either that or add a public method to just start the hide
timeout. Calling showUi here is odd.

[raymes, 2015/03/02 02:23:15]

Done.

       // Document load complete.
       if (this.lastViewportPosition_)
         this.viewport_.position = this.lastViewportPosition_;
       this.paramsParser_.getViewportFromUrlParams(
           this.streamDetails_.originalUrl, this.handleURLParams_.bind(this));
       this.loaded_ = true;
       this.sendScriptingMessage_({
         type: 'documentLoaded'
       });
       while (this.delayedScriptingMessages_.length > 0)
@@ skipping 350 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_;
   }
 };