OOP PDF: Allow print preview to handle key events when the plugin has focus

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 394 matching lines @@
       this.tracker.add(
           this.printHeader_,
           print_preview.PrintHeader.EventType.PRINT_BUTTON_CLICK,
           this.onPrintButtonClick_.bind(this));
       this.tracker.add(
           this.printHeader_,
           print_preview.PrintHeader.EventType.CANCEL_BUTTON_CLICK,
           this.onCancelButtonClick_.bind(this));
 
       this.tracker.add(window, 'keydown', this.onKeyDown_.bind(this));
+      this.previewArea_.setPluginKeyEventCallback(this.onKeyDown_.bind(this));
 
       this.tracker.add(
           this.destinationSettings_,
           print_preview.DestinationSettings.EventType.CHANGE_BUTTON_ACTIVATE,
           this.onDestinationChangeButtonActivate_.bind(this));
 
       this.tracker.add(
           this.destinationSearch_,
           print_preview.DestinationSearch.EventType.MANAGE_CLOUD_DESTINATIONS,
           this.onManageCloudDestinationsActivated_.bind(this));
@@ skipping 882 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/fedex_tos.js">
 
 window.addEventListener('DOMContentLoaded', function() {
   printPreview = new print_preview.PrintPreview();
   printPreview.initialize();
 });