Print Preview: Finish removing global Javascript functions.

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

 // Copyright 2016 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.
 
 cr.define('print_preview_test', function() {
   /**
    * Index of the "Save as PDF" printer.
    * @type {number}
    * @const
    */
@@ skipping 675 matching lines @@
       });
     });
 
     // When the number of copies print preset is set for source 'PDF', we update
     // the copies value if capability is supported by printer.
     test('CheckNumCopiesPrintPreset', function() {
       initialSettings.isDocumentModifiable_ = false;
       return setupSettingsAndDestinationsWithCapabilities().then(function() {
         // Indicate that the number of copies print preset is set for source
         // PDF.
-        var printPresetOptions = {
-          disableScaling: true,
-          copies: 2
-        };
-        var printPresetOptionsEvent = new Event(
-            print_preview.NativeLayer.EventType.PRINT_PRESET_OPTIONS);
-        printPresetOptionsEvent.optionsFromDocument = printPresetOptions;
-        nativeLayer.getEventTarget().
-            dispatchEvent(printPresetOptionsEvent);
-
+        var copies = 2;
+        cr.webUIListenerCallback('print-preset-options', true, copies);
         checkSectionVisible($('copies-settings'), true);
         expectEquals(
-            printPresetOptions.copies,
-            parseInt($('copies-settings').
-                querySelector('.user-value').value));
+            copies,
+            parseInt($('copies-settings').querySelector('.user-value').value));
 
         return whenAnimationDone('other-options-collapsible');
       });
     });
 
     // When the duplex print preset is set for source 'PDF', we update the
     // duplex setting if capability is supported by printer.
     test('CheckDuplexPrintPreset', function() {
       initialSettings.isDocumentModifiable_ = false;
       return setupSettingsAndDestinationsWithCapabilities().then(function() {
         // Indicate that the duplex print preset is set to 'long edge' for
         // source PDF.
-        var printPresetOptions = {
-          duplex: 1
-        };
-        var printPresetOptionsEvent = new Event(
-            print_preview.NativeLayer.EventType.PRINT_PRESET_OPTIONS);
-        printPresetOptionsEvent.optionsFromDocument = printPresetOptions;
-        nativeLayer.getEventTarget().
-            dispatchEvent(printPresetOptionsEvent);
-
+        cr.webUIListenerCallback('print-preset-options', false, 1, 1);
         var otherOptions = $('other-options-settings');
         checkSectionVisible(otherOptions, true);
         var duplexContainer =
             otherOptions.querySelector('#duplex-container');
         checkElementDisplayed(duplexContainer, true);
         expectTrue(duplexContainer.querySelector('.checkbox').checked);
 
         return whenAnimationDone('other-options-collapsible');
       });
     });
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       return setupSettingsAndDestinationsWithCapabilities().then(function() {
         // The system default destination should be used instead of the
         // most recent destination.
         assertEquals(
             'FooDevice',
             printPreview.destinationStore_.selectedDestination.id);
       });
     });
   });
 });