Create a Factory for NativeMetafile.

printing/native_metafile.h

 // Copyright (c) 2009 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_NATIVE_METAFILE_H_
-#define PRINTING_NATIVE_METAFILE_H_
+#ifndef NATIVE_METAFILE_H_
+#define NATIVE_METAFILE_H_
 
-#include "build/build_config.h"
-
-// Define a metafile format for the current platform.  We use this platform
-// independent define so we can define interfaces in platform agnostic manner.
-// It is still an outstanding design issue whether we create classes on all
-// platforms that have the same interface as Emf or if we change Emf to support
-// multiple platforms (and rename to NativeMetafile).
-
+#include "base/basictypes.h"
 
 #if defined(OS_WIN)
-
-#include "printing/emf_win.h"
-
-namespace printing {
-
-typedef Emf NativeMetafile;
-
-}  // namespace printing
-
+  #include "printing/native_metafile_win.h"
 #elif defined(OS_MACOSX)
-
-#include "printing/pdf_metafile_mac.h"
-
-namespace printing {
-
-typedef PdfMetafile NativeMetafile;
-
-}  // namespace printing
-
+  #include "printing/native_metafile_mac.h"
 #elif defined(OS_POSIX)
-
-#include "printing/pdf_ps_metafile_cairo.h"
-
-namespace printing {
-
-typedef PdfPsMetafile NativeMetafile;
-
-}  // namespace printing
-
+  #include "printing/native_metafile_linux.h"
 #endif
 
-
-#endif  // PRINTING_NATIVE_METAFILE_H_
+#endif /* NATIVE_METAFILE_H_ */