Fix Print Preview failure state and add test

chrome/browser/resources/print_preview/print_preview.js

 // Copyright (c) 2012 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.
 
 // TODO(rltoscano): Move data/* into print_preview.data namespace
 
 // <include src="component.js">
 // <include src="print_preview_focus_manager.js">
 
 cr.define('print_preview', function() {
@@ skipping 916 matching lines @@
     },
 
     /**
      * Called when native layer receives invalid settings for a print request.
      * @private
      */
     onSettingsInvalid_: function() {
       this.uiState_ = PrintPreview.UiState_.ERROR;
       this.isPreviewGenerationInProgress_ = false;
       this.printHeader_.isPrintButtonEnabled = false;
-      console.error('Invalid settings error reported from native layer');
       this.previewArea_.cancelTimeout();
       this.previewArea_.showCustomMessage(
           loadTimeData.getString('invalidPrinterSettings'));
     },
 
     /**
      * Called when the destination settings' change button is activated.
      * Displays the destination search component.
      * @private
      */
@@ skipping 245 matching lines @@
     /**
      * Called when a print destination is selected. Shows/hides the "Print with
      * Cloud Print" link in the navbar.
      * @private
      */
     onDestinationSelect_: function() {
       if ($('system-dialog-link')) {
         setIsVisible($('system-dialog-link'),
                      this.shouldShowSystemDialogLink_());
       }
+      // Reset if we had a bad settings fetch since the user selected a new
+      // printer.
+      if (this.uiState_ == PrintPreview.UiState_.ERROR)
+        this.uiState_ = PrintPreview.UiState_.READY;
       if (this.destinationStore_.selectedDestination &&
           this.isInKioskAutoPrintMode_) {
         this.onPrintButtonClick_();
       }
     },
 
     /**
      * Called when the destination store loads a group of destinations. Shows
      * a promo on Chrome OS if the user has no print destinations promoting
      * Google Cloud Print.
@@ skipping 125 matching lines @@
 // <include src="search/cloud_destination_list.js">
 // <include src="search/recent_destination_list.js">
 // <include src="search/destination_list_item.js">
 // <include src="search/destination_search.js">
 // <include src="search/provisional_destination_resolver.js">
 
 window.addEventListener('DOMContentLoaded', function() {
   printPreview = new print_preview.PrintPreview();
   printPreview.initialize();
 });