Create a Factory for NativeMetafile.

printing/metafile_factory.cc

Index: printing/metafile_factory.cc
diff --git a/printing/metafile_factory.cc b/printing/metafile_factory.cc
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+++ b/printing/metafile_factory.cc
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+/// Copyright (c) 2010 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/metafile_factory.h"
+
+namespace printing {
+
+/* static */
+printing::NativeMetafile* MetafileFactory::GetMetafile(){
+
+#if defined(OS_WIN)
+  printing::NativeMetafile* metafile_ptr =  new printing::Emf;
+#elif defined(OS_MACOSX)
+  printing::NativeMetafile* metafile_ptr =  new printing::PdfMetafile;
+#elif defined(OS_POSIX)
+  printing::NativeMetafile* metafile_ptr =  new printing::PdfPsMetafile;
+#endif
+
+  return metafile_ptr;
+
+}
+
+#if defined(OS_LINUX)
+/* static */
+printing::NativeMetafile* MetafileFactory::GetMetafileFrom(cairo_t* context){
+  printing::NativeMetafile* metafile_ptr =
+      printing::PdfPsMetafile::FromCairoContext(context);
+  return metafile_ptr;
+}
+#endif
+
+} // namespace printing