Allow page range selection in system dialog called from preview

printing/printing_context_linux.h

 // Copyright 2014 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.
 
 #ifndef PRINTING_PRINTING_CONTEXT_LINUX_H_
 #define PRINTING_PRINTING_CONTEXT_LINUX_H_
 
 #include <string>
 
 #include "printing/printing_context.h"
@@ skipping 26 matching lines @@
   void PrintDocument(const MetafilePlayer& metafile);
 
   // PrintingContext implementation.
   void AskUserForSettings(int max_pages,
                           bool has_selection,
                           bool is_scripted,
                           const PrintSettingsCallback& callback) override;
   gfx::Size GetPdfPaperSizeDeviceUnits() override;
   Result UseDefaultSettings() override;
   Result UpdatePrinterSettings(bool external_preview,
-                               bool show_system_dialog) override;
+                               bool show_system_dialog,
+                               int page_count) override;
   Result InitWithSettings(const PrintSettings& settings) override;
   Result NewDocument(const base::string16& document_name) override;
   Result NewPage() override;
   Result PageDone() override;
   Result DocumentDone() override;
   void Cancel() override;
   void ReleaseContext() override;
   gfx::NativeDrawingContext context() const override;
 
  private:
   base::string16 document_name_;
   PrintDialogGtkInterface* print_dialog_;
 
   DISALLOW_COPY_AND_ASSIGN(PrintingContextLinux);
 };
 
 }  // namespace printing
 
 #endif  // PRINTING_PRINTING_CONTEXT_LINUX_H_