Allow page range selection in system dialog called from preview

printing/printing_context.cc

 // Copyright (c) 2011 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.
 
 #include "printing/printing_context.h"
 
 #include "base/logging.h"
 #include "base/values.h"
 #include "printing/page_setup.h"
 #include "printing/page_size_margins.h"
@@ skipping 100 matching lines @@
     if (print_to_cloud || print_with_privet) {
       paper_rect.Inset(
           kCloudPrintMarginInch * settings_.device_units_per_inch(),
           kCloudPrintMarginInch * settings_.device_units_per_inch());
     }
     settings_.SetPrinterPrintableArea(paper_size, paper_rect, true);
     return OK;
   }
 
   bool show_system_dialog = false;
-  job_settings.GetBoolean(printing::kSettingShowSystemDialog,
-                          &show_system_dialog);
+  job_settings.GetBoolean(kSettingShowSystemDialog, &show_system_dialog);
 
-  return UpdatePrinterSettings(open_in_external_preview, show_system_dialog);
+  int page_count = 0;
+  job_settings.GetInteger(kSettingPreviewPageCount, &page_count);
+
+  return UpdatePrinterSettings(open_in_external_preview, show_system_dialog,
+                               page_count);
 }
 
 }  // namespace printing