Extracted MetafilePlayer interface from printing::MetafilePlayer.

chrome/renderer/printing/print_web_view_helper_pdf_win.cc

Index: chrome/renderer/printing/print_web_view_helper_pdf_win.cc
diff --git a/chrome/renderer/printing/print_web_view_helper_pdf_win.cc b/chrome/renderer/printing/print_web_view_helper_pdf_win.cc
index d0b7621ae1b89487bcfd7e089004502abe3445c5..5a7a24937f6f28f08cc2ae1fcdedf2b959caae49 100644
--- a/chrome/renderer/printing/print_web_view_helper_pdf_win.cc
+++ b/chrome/renderer/printing/print_web_view_helper_pdf_win.cc
@@ -49,8 +49,8 @@ bool PrintWebViewHelper::RenderPreviewPage(
   } else if (print_preview_context_.IsModifiable() &&
              print_preview_context_.generate_draft_pages()) {
     DCHECK(!draft_metafile.get());
-    draft_metafile.reset(
-        print_preview_context_.metafile()->GetMetafileForCurrentPage());
+    draft_metafile =
+        print_preview_context_.metafile()->GetMetafileForCurrentPage();
   }
   return PreviewPageRendered(page_number, draft_metafile.get());
 }