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

chrome/test/data/webui/print_preview.js

Index: chrome/test/data/webui/print_preview.js
diff --git a/chrome/test/data/webui/print_preview.js b/chrome/test/data/webui/print_preview.js
index 7d4a2adcba895a363e532094d78bbfea878ca6de..72e883041ee602386bb00d7a2368f3193d4af1fa 100644
--- a/chrome/test/data/webui/print_preview.js
+++ b/chrome/test/data/webui/print_preview.js
@@ -398,3 +398,46 @@ TEST_F('PrintPreviewNoPDFWebUITest', 'TestErrorMessage', function() {
   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();
+});