Improved handling of importer profile creation.

chrome/utility/importer/importer_creator.cc

 // Copyright 2013 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/utility/importer/importer_creator.h"
 
 #include "base/logging.h"
 #include "chrome/utility/importer/bookmarks_file_importer.h"
 #include "chrome/utility/importer/firefox_importer.h"
 
 #if defined(OS_WIN)
 #include "chrome/common/importer/edge_importer_utils_win.h"
 #include "chrome/utility/importer/edge_importer_win.h"
 #include "chrome/utility/importer/ie_importer_win.h"
 #endif
 
 #if defined(OS_MACOSX)
 #include <CoreFoundation/CoreFoundation.h>
 
 #include "base/mac/foundation_util.h"
 #include "chrome/utility/importer/safari_importer.h"
 #endif
 
 namespace importer {
 
-Importer* CreateImporterByType(ImporterType type) {
+scoped_refptr<Importer> CreateImporterByType(ImporterType type) {
   switch (type) {
 #if defined(OS_WIN)
     case TYPE_IE:
       return new IEImporter();
     case TYPE_EDGE:
       // If legacy mode we pass back an IE importer.
       if (IsEdgeFavoritesLegacyMode())
         return new IEImporter();
       return new EdgeImporter();
 #endif
     case TYPE_BOOKMARKS_FILE:
       return new BookmarksFileImporter();
     case TYPE_FIREFOX:
       return new FirefoxImporter();
 #if defined(OS_MACOSX)
     case TYPE_SAFARI:
       return new SafariImporter(base::mac::GetUserLibraryPath());
 #endif
     default:
       NOTREACHED();
-      return NULL;
+      return nullptr;
   }
 }
 
 }  // namespace importer