Create a Factory for NativeMetafile.

printing/image.cc

Index: printing/image.cc
diff --git a/printing/image.cc b/printing/image.cc
index 1116f32e958c0b44e409284053cbe3e8c2b2c72d..bb3233ef0e78c2dca740f453437bde607df00c8f 100644
--- a/printing/image.cc
+++ b/printing/image.cc
@@ -7,6 +7,8 @@
 #include "base/file_util.h"
 #include "base/md5.h"
 #include "base/string_number_conversions.h"
+#include "printing/metafile_factory.h"
+#include "base/scoped_ptr.h"
 #include "third_party/skia/include/core/SkColor.h"
 #include "ui/gfx/codec/png_codec.h"
 
@@ -144,9 +146,10 @@ bool Image::LoadPng(const std::string& compressed) {
 
 bool Image::LoadMetafile(const std::string& data) {
   DCHECK(!data.empty());
-  NativeMetafile metafile;
-  metafile.Init(data.data(), data.size());
-  return LoadMetafile(metafile);
+  scoped_ptr<NativeMetafile> metafile(
+      printing::MetafileFactory::GetMetafile());
+  metafile->Init(data.data(), data.size());
+  return LoadMetafile(*metafile.get());
 }
 
 }  // namespace printing