Print Preview: Make generate draft mode work again.

chrome/browser/resources/print_preview/native_layer.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.
 
 cr.exportPath('print_preview');
 
 /**
  * @typedef {{selectSaveAsPdfDestination: boolean,
  *            layoutSettings.portrait: boolean,
  *            pageRange: string,
@@ skipping 259 matching lines @@
      * dispatched in response:
      *   - PAGE_COUNT_READY
      *   - PAGE_LAYOUT_READY
      *   - PAGE_PREVIEW_READY
      *   - PREVIEW_GENERATION_DONE
      *   - PREVIEW_GENERATION_FAIL
      * @param {!print_preview.Destination} destination Destination to print to.
      * @param {!print_preview.PrintTicketStore} printTicketStore Used to get the
      *     state of the print ticket.
      * @param {!print_preview.DocumentInfo} documentInfo Document data model.
+     * @param {boolean} generateDraft Tell the renderer to re-render.
      * @param {number} requestId ID of the preview request.
      */
     startGetPreview: function(
-        destination, printTicketStore, documentInfo, requestId) {
+        destination, printTicketStore, documentInfo, generateDraft, requestId) {
       assert(printTicketStore.isTicketValidForPreview(),
              'Trying to generate preview when ticket is not valid');
 
       var ticket = {
         'pageRange': printTicketStore.pageRange.getDocumentPageRanges(),
         'mediaSize': printTicketStore.mediaSize.getValue(),
         'landscape': printTicketStore.landscape.getValue(),
         'color': this.getNativeColorModel_(destination, printTicketStore.color),
         'headerFooterEnabled': printTicketStore.headerFooter.getValue(),
         'marginsType': printTicketStore.marginsType.getValue(),
         'isFirstRequest': requestId == 0,
         'requestID': requestId,
         'previewModifiable': documentInfo.isModifiable,
-        'generateDraftData': documentInfo.isModifiable,
+        'generateDraftData': generateDraft,
         'fitToPageEnabled': printTicketStore.fitToPage.getValue(),
         'scaleFactor': printTicketStore.scaling.getValueAsNumber(),
         // NOTE: Even though the following fields don't directly relate to the
         // preview, they still need to be included.
         // e.g. printing::PrintSettingsFromJobSettings() still checks for them.
         'collate': true,
         'copies': 1,
         'deviceName': destination.id,
         'dpiHorizontal': "horizontal_dpi" in printTicketStore.dpi.getValue() ?
            printTicketStore.dpi.getValue().horizontal_dpi : 0,
@@ skipping 26 matching lines @@
           'marginTop': customMargins.get(orientationEnum.TOP),
           'marginRight': customMargins.get(orientationEnum.RIGHT),
           'marginBottom': customMargins.get(orientationEnum.BOTTOM),
           'marginLeft': customMargins.get(orientationEnum.LEFT)
         };
       }
 
       chrome.send(
           'getPreview',
           [JSON.stringify(ticket),
-           requestId > 0 ? documentInfo.pageCount : -1,
-           documentInfo.isModifiable]);
+           requestId > 0 ? documentInfo.pageCount : -1]);
     },
 
     /**
      * Requests that the document be printed.
      * @param {!print_preview.Destination} destination Destination to print to.
      * @param {!print_preview.PrintTicketStore} printTicketStore Used to get the
      *     state of the print ticket.
      * @param {cloudprint.CloudPrintInterface} cloudPrintInterface Interface
      *     to Google Cloud Print.
      * @param {!print_preview.DocumentInfo} documentInfo Document data model.
@@ skipping 748 matching lines @@
       return this.serializedDefaultDestinationSelectionRulesStr_;
     }
   };
 
   // Export
   return {
     NativeInitialSettings: NativeInitialSettings,
     NativeLayer: NativeLayer
   };
 });