Print Preview: Migrate some JS tests to use Mocha.

chrome/test/data/webui/print_preview/print_preview_ui_browsertest.js

+// Copyright 2017 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.
+
+/** @fileoverview Runs the Print Preview tests. */
+
+var ROOT_PATH = '../../../../../';
+
+/**
+ * @constructor
+ * @extends {testing.Test}
+ */
+function PrintPreviewUIBrowserTest() {}
+
+PrintPreviewUIBrowserTest.prototype = {
+  __proto__: testing.Test.prototype,
+
+  /**
+   * Browse to the sample page, cause print preview & call preLoad().
+   * @override
+   */
+  browsePrintPreload: 'print_preview/print_preview_hello_world_test.html',
+
+  /** @override */
+  runAccessibilityChecks: true,
+
+  /** @override */
+  accessibilityIssuesAreErrors: false,
+
+  /** @override */
+  isAsync: true,
+
+  /** @override */
+  preLoad: function() {
+    window.isTest = true;
+    testing.Test.prototype.preLoad.call(this);
+
+  },
+
+  /** @override */
+  setUp: function() {
+    testing.Test.prototype.setUp.call(this);
+
+    testing.Test.disableAnimationsAndTransitions();
+    // Enable when failure is resolved.
+    // AX_TEXT_03: http://crbug.com/559209
+    this.accessibilityAuditConfig.ignoreSelectors(
+        'multipleLabelableElementsPerLabel',
+        '#page-settings > .right-column > *');
+  },
+
+  extraLibraries: [
+    ROOT_PATH + 'ui/webui/resources/js/cr.js',
+    ROOT_PATH + 'ui/webui/resources/js/promise_resolver.js',
+    ROOT_PATH + 'third_party/mocha/mocha.js',
+    ROOT_PATH + 'chrome/test/data/webui/mocha_adapter.js',
+    ROOT_PATH + 'ui/webui/resources/js/util.js',
+    ROOT_PATH + 'chrome/test/data/webui/settings/test_browser_proxy.js',
+    'print_preview_tests.js',
+    'native_layer_stub.js',
+  ],
+};
+
+TEST_F('PrintPreviewUIBrowserTest', 'PrinterList', function() {
+  mocha.grep(/PrinterList\b/).run();
+});
+
+TEST_F('PrintPreviewUIBrowserTest', 'PrinterListCloudEmpty', function() {
+  mocha.grep(/PrinterListCloudEmpty\b/).run();
+});
+
+TEST_F('PrintPreviewUIBrowserTest', 'RestoreLocalDestination', function() {
+  mocha.grep(/RestoreLocalDestination\b/).run();
+});
+
+TEST_F('PrintPreviewUIBrowserTest', 'RestoreMultipleDestinations', function() {
+  mocha.grep(/RestoreMultipleDestinations\b/).run();
+});
+
+TEST_F('PrintPreviewUIBrowserTest', 'DefaultDestinationSelectionRules',
+    function() {
+      mocha.grep(/DefaultDestinationSelectionRules\b/).run();
+    });