Print Preview: Make useCloudPrint a WebUI event

chrome/browser/resources/print_preview/print_preview.js

 // Copyright (c) 2012 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.
 
 // TODO(rltoscano): Move data/* into print_preview.data namespace
 
 // <include src="component.js">
 // <include src="print_preview_focus_manager.js">
 //
 
@@ skipping 322 matching lines @@
       cr.ui.FocusOutlineManager.forDocument(document);
       this.listenerTracker.add('print-failed', this.onPrintFailed_.bind(this));
       this.listenerTracker.add(
           'privet-printer-added',
           this.destinationStore_.onPrivetPrinterAdded_.bind(
               this.destinationStore_));
       this.listenerTracker.add(
           'extension-printers-added',
           this.destinationStore_.onExtensionPrintersAdded_.bind(
               this.destinationStore_));
+      this.listenerTracker.add(
+          'use-cloud-print', this.onCloudPrintEnable_.bind(this));
     },
 
     /** @override */
     enterDocument: function() {
       // Native layer events.
       var nativeLayerEventTarget = this.nativeLayer_.getEventTarget();
       this.tracker.add(
           nativeLayerEventTarget,
-          print_preview.NativeLayer.EventType.CLOUD_PRINT_ENABLE,
-          this.onCloudPrintEnable_.bind(this));
-      this.tracker.add(
-          nativeLayerEventTarget,
           print_preview.NativeLayer.EventType.SETTINGS_INVALID,
           this.onSettingsInvalid_.bind(this));
       this.tracker.add(
           nativeLayerEventTarget,
           print_preview.NativeLayer.EventType.PRINT_PRESET_OPTIONS,
           this.onPrintPresetOptionsFromDocument_.bind(this));
       this.tracker.add(
           nativeLayerEventTarget,
           print_preview.NativeLayer.EventType.PAGE_COUNT_READY,
           this.onPageCountReady_.bind(this));
@@ skipping 316 matching lines @@
       $('document-title').innerText = settings.documentTitle;
       this.hideSystemDialogLink_ = settings.isInAppKioskMode;
       if ($('system-dialog-link')) {
         setIsVisible(
             getRequiredElement('system-dialog-link'),
             this.shouldShowSystemDialogLink_());
       }
     },
 
     /**
-     * Calls when the native layer enables Google Cloud Print integration.
+     * Called when Google Cloud Print integration is enabled by the
+     * PrintPreviewHandler.
      * Fetches the user's cloud printers.
-     * @param {Event} event Contains the base URL of the Google Cloud Print
-     *     service.
+     * @param {string} cloudPrintUrl The URL to use for cloud print servers.
+     * @param {boolean} appKioskMode Whether to print automatically for kiosk
+     *     mode.
      * @private
      */
-    onCloudPrintEnable_: function(event) {
+    onCloudPrintEnable_: function(cloudPrintUrl, appKioskMode) {
       this.cloudPrintInterface_ = new cloudprint.CloudPrintInterface(
-          event.baseCloudPrintUrl, this.nativeLayer_, this.userInfo_,
-          event.appKioskMode);
+          cloudPrintUrl, this.nativeLayer_, this.userInfo_, appKioskMode);

[rbpotter, 2017/06/27 22:30:30]

Note: there is now no reason cloudPrintUrl or appKioskMode should ever
be undefined.

       this.tracker.add(
           this.cloudPrintInterface_,
           cloudprint.CloudPrintInterfaceEventType.SUBMIT_DONE,
           this.onCloudPrintSubmitDone_.bind(this));
       this.tracker.add(
           this.cloudPrintInterface_,
           cloudprint.CloudPrintInterfaceEventType.SEARCH_FAILED,
           this.onCloudPrintError_.bind(this));
       this.tracker.add(
           this.cloudPrintInterface_,
@@ skipping 652 matching lines @@
 // <include src="search/destination_search.js">
 // <include src="search/provisional_destination_resolver.js">
 
 window.addEventListener('DOMContentLoaded', function() {
   var previewWindow = /** @type {{isTest: boolean}} */ (window);
   if (!previewWindow.isTest) {
     var printPreview = new print_preview.PrintPreview();
     printPreview.initialize();
   }
 });