Create a Factory for NativeMetafile.

printing/pdf_ps_metafile_cairo.cc

Index: printing/pdf_ps_metafile_cairo.cc
diff --git a/printing/pdf_ps_metafile_cairo.cc b/printing/pdf_ps_metafile_cairo.cc
index 798ee1608e5898ff9d78452e2bf067b9ddffb26e..4244e18fa460e69a7e2c12a0c44f29ee89f7aaed 100644
--- a/printing/pdf_ps_metafile_cairo.cc
+++ b/printing/pdf_ps_metafile_cairo.cc
@@ -1,4 +1,4 @@
-// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// 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.
 
@@ -72,12 +72,8 @@ namespace printing {
 
 PdfPsMetafile::PdfPsMetafile()
     : format_(PDF),
-      surface_(NULL), context_(NULL) {
-}
-
-PdfPsMetafile::PdfPsMetafile(const FileFormat& format)
-    : format_(format),
-      surface_(NULL), context_(NULL) {
+      surface_(NULL),
+      context_(NULL) {
 }
 
 PdfPsMetafile::~PdfPsMetafile() {