Unifying NativeMetafile class interface (as much as possible) for Linux, Mac, Win

chrome/browser/printing/print_dialog_gtk.cc

 // 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.
 
 #include "chrome/browser/printing/print_dialog_gtk.h"
 
 #include <fcntl.h>
 #include <gtk/gtkpagesetupunixdialog.h>
 #include <gtk/gtkprintjob.h>
 #include <sys/stat.h>
@@ skipping 138 matching lines @@
 void PrintDialogGtk::SaveDocumentToDisk(const NativeMetafile* metafile,
                                         const string16& document_name) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE));
 
   bool error = false;
   if (!file_util::CreateTemporaryFile(&path_to_pdf_)) {
     LOG(ERROR) << "Creating temporary file failed";
     error = true;
   }
 
-  if (!error) {
-    base::FileDescriptor temp_file_fd;
-    temp_file_fd.fd = open(path_to_pdf_.value().c_str(), O_WRONLY);
-    temp_file_fd.auto_close = true;
-    if (!metafile->SaveTo(temp_file_fd)) {
-      LOG(ERROR) << "Saving metafile failed";
-      file_util::Delete(path_to_pdf_, false);
-      error = true;
-    }
+  if (!error && !metafile->SaveTo(path_to_pdf_)) {
+    LOG(ERROR) << "Saving metafile failed";
+    file_util::Delete(path_to_pdf_, false);
+    error = true;
   }
 
   // Done saving, let PrintDialogGtk::PrintDocument() continue.
   save_document_event_->Signal();
 
   if (error) {
     Release();
   } else {
     // No errors, continue printing.
     BrowserThread::PostTask(
@@ skipping 34 matching lines @@
       NULL);
   // Printing finished.
   Release();
 }
 
 void PrintDialogGtk::set_save_document_event(base::WaitableEvent* event) {
   DCHECK(event);
   DCHECK(!save_document_event_);
   save_document_event_ = event;
 }