Print Preview: Migrate remaining 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,

[rbpotter, 2017/05/31 23:28:24]

Maybe we should add a comment here about why accessibility checks
are not errors, to replace the inaccurate comment noted earlier
and to explain the change from the old tests.

[dpapad, 2017/06/01 00:29:48]

I restored this value to true, and only turning it off for the same tests as
before.

 
   /** @override */
   isAsync: true,
 
   /** @override */
   preLoad: function() {
     window.isTest = true;
     testing.Test.prototype.preLoad.call(this);
 
   },
@@ skipping 36 matching lines @@
   'SourceIsPDFCapabilities',
   'ScalingUnchecksFitToPage',
   'CheckNumCopiesPrintPreset',
   'CheckDuplexPrintPreset',
   'CustomMarginsControlsCheck',
   'PageLayoutHasNoMarginsHideHeaderFooter',
   'PageLayoutHasMarginsShowHeaderFooter',
   'ZeroTopAndBottomMarginsHideHeaderFooter',
   'ZeroTopAndNonZeroBottomMarginShowHeaderFooter',
   'SmallPaperSizeHeaderFooter',
-  'TestColorSettingsMonochrome',
-  'TestColorSettingsCustomMonochrome',
-  'TestColorSettingsColor',
-  'TestColorSettingsCustomColor',
-  'TestColorSettingsBothStandardDefaultColor',
-  'TestColorSettingsBothStandardDefaultMonochrome',
-  'TestColorSettingsBothCustomDefaultColor',
+  'ColorSettingsMonochrome',
+  'ColorSettingsCustomMonochrome',
+  'ColorSettingsColor',
+  'ColorSettingsCustomColor',
+  'ColorSettingsBothStandardDefaultColor',
+  'ColorSettingsBothStandardDefaultMonochrome',
+  'ColorSettingsBothCustomDefaultColor',
+  'DuplexSettingsTrue',
+  'DuplexSettingsFalse',
+  'PrinterChangeUpdatesPreview',
+  'NoPDFPluginErrorMessage',
+  'CustomPaperNames',
+  'AdvancedSettings1Option',
+  'AdvancedSettings2Options',
+  'InitIssuesOneRequest',
+  'InvalidSettingsError',
+  'GenerateDraft',
 ].forEach(function(testName) {
   TEST_F('PrintPreviewUIBrowserTest', testName, function() {
     mocha.grep(new RegExp(testName + '\\b')).run();
   });
 });