Print Preview: Get rid of the loading div on failure.

chrome/browser/resources/print_preview.js

 // Copyright (c) 2011 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.
 
 var localStrings = new LocalStrings();
 
 // Whether or not the PDF plugin supports all the capabilities needed for
 // print preview.
 var hasCompatiblePDFPlugin = true;
 
@@ skipping 289 matching lines @@
  * Asks the browser to print the preview PDF based on current print settings.
  */
 function printFile() {
   chrome.send('print', [getSettingsJSON()]);
 }
 
 /**
  * Asks the browser to generate a preview PDF based on current print settings.
  */
 function requestPrintPreview() {
+  $('dancing-dots').classList.remove('hidden');
   $('dancing-dots').classList.remove('invisible');
   chrome.send('getPreview', [getSettingsJSON()]);
 }
 
 /**
  * Fill the printer list drop down.
  * Called from PrintPreviewHandler::SendPrinterList().
  * @param {Array} printers Array of printer names.
  * @param {number} defaultPrinterIndex The index of the default printer.
  */
@@ skipping 33 matching lines @@
     return;
   }
   pdfViewer.grayscale(!color);
 }
 
 /**
  * Display an error message when print preview fails.
  * Called from PrintPreviewMessageHandler::OnPrintPreviewFailed().
  */
 function printPreviewFailed() {
+  $('dancing-dots').classList.add('hidden');
   $('preview-failed').classList.remove('hidden');
 
   var pdfViewer = $('pdf-viewer');
   if (pdfViewer)
     $('mainview').removeChild(pdfViewer);
 }
 
 /**
  * Called when the PDF plugin loads its document.
  */
@@ skipping 61 matching lines @@
   pdfPlugin.setAttribute('id', 'pdf-viewer');
   pdfPlugin.setAttribute('type', 'application/pdf');
   pdfPlugin.setAttribute('src', 'chrome://print/print.pdf');
   var mainView = $('mainview');
   mainView.appendChild(pdfPlugin);
 
   // Check to see if the PDF plugin is our PDF plugin. (or compatible)
   if (!pdfPlugin.onload) {
     hasCompatiblePDFPlugin = false;
     mainView.removeChild(pdfPlugin);
+    $('dancing-dots').classList.add('hidden');
     $('no-plugin').classList.remove('hidden');
     return;
   }
   pdfPlugin.onload('onPDFLoad()');
 
   // Older version of the PDF plugin may not have this method.
   // TODO(thestig) Eventually remove this.
   if (pdfPlugin.removePrintButton) {
     pdfPlugin.removePrintButton();
   }
@@ skipping 252 matching lines @@
  * Returns true if the contents of the two arrays are equal.
  */
 function areArraysEqual(array1, array2) {
   if (array1.length != array2.length)
     return false;
   for (var i = 0; i < array1.length; i++)
     if(array1[i] != array2[i])
       return false;
   return true;
 }