Move Emf class to the printing library. Also creates a platform agnostic Nat...

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__
+
+// 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).
+
+
+#if defined(OS_WIN)
+
+#include "printing/emf_win.h"
+
+namespace printing {
+
+typedef Emf NativeMetafile;
+
+}  // namespace printing
+
+#elif defined(OS_MACOSX)
+
+// TODO(port): Printing using PDF?
+
+#elif defined(OS_LINUX)
+
+// TODO(port): Printing using PostScript?
+
+#endif
+
+
+#endif  // PRINTING_NATIVE_METAFILE_H__