Connect the right metafiles for print preview on Linux and Windows.

printing/print_dialog_gtk_interface.h

 // 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.
 
 #ifndef PRINTING_PRINT_DIALOG_GTK_INTERFACE_H_
 #define PRINTING_PRINT_DIALOG_GTK_INTERFACE_H_
 
 #include "base/string16.h"
 #include "printing/printing_context_cairo.h"
 
 namespace printing {
 
+class Metafile;
+
 // An interface for GTK printing dialogs. Classes that live outside of
 // printing/ can implement this interface and get threading requirements
 // correct without exposing those requirements to printing/.
 class PrintDialogGtkInterface {
  public:
   // Shows the dialog and handles the response with |callback|.
   virtual void ShowDialog(
       PrintingContextCairo::PrintSettingsCallback* callback) = 0;
 
   // Prints the document named |document_name| contained in |metafile|.
   // Called from the print worker thread. Once called, the
   // PrintDialogGtkInterface instance should not be reused.
-  virtual void PrintDocument(const NativeMetafile* metafile,
+  virtual void PrintDocument(const Metafile* metafile,
                              const string16& document_name) = 0;
 
   // Same as AddRef/Release, but with different names since
   // PrintDialogGtkInterface does not inherit from RefCounted.
   virtual void AddRefToDialog() = 0;
   virtual void ReleaseDialog() = 0;
 
  protected:
   virtual ~PrintDialogGtkInterface() {}
 };
 
 }  // namespace printing
 
 #endif  // PRINTING_PRINT_DIALOG_GTK_INTERFACE_H_