Be able to print items that do window.print(); window.close() (airline tix e.g.)

chrome/test/data/webui/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.
 
 /**
  * Test fixture for print preview WebUI testing.
  * @extends {testing.Test}
  * @constructor
  **/
 function PrintPreviewWebUITest() {}
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 // Test that error message is displayed when plugin doesn't exist.
 TEST_F('PrintPreviewNoPDFWebUITest', 'TestErrorMessage', function() {
   var errorButton = $('error-button');
   assertNotEquals(null, errorButton);
   expectFalse(errorButton.disabled);
   var errorText = $('error-text');
   assertNotEquals(null, errorText);
   expectFalse(errorText.classList.contains('hidden'));
 });
+
+/**
+ * Test fixture to test case when no PDF plugin exists.
+ * @extends {PrintPreviewWebUITest}
+ * @constructor
+ **/
+function PrintPreviewPrintCloseWebUITest() {}
+
+PrintPreviewPrintCloseWebUITest.prototype = {
+  __proto__: PrintPreviewWebUITest.prototype,
+
+  /**
+   * Open a page, which does window.print(); window.close();
+   * @type {?string}
+   * @override
+   **/
+  browsePrintPreload: 'print_preview_print_close_test.html',
+
+  /**
+   * Indicate to browsertest not to print because the page will contain
+   * JavaScript to window.print().
+   * @type {boolean}
+   **/
+  noPrint: true,
+
+  /**
+   * Provide a typedef for C++ to correspond to JS subclass.
+   * @type {?string}
+   * @override
+   **/
+  typedefCppFixture: 'PrintPreviewWebUITest',
+};
+
+// Test that window.print(); window.close() still works with cancel.
+TEST_F('PrintPreviewPrintCloseWebUITest', 'TestPrintCloseCancel', function() {
+  assertTrue(true);
+  this.mockHandler.expects(once()).closePrintPreviewTab().
+      will(callFunction(function() {
+        window.close();
+      }));
+
+  $('cancel-button').click();
+});