Media galleries preferences also needs to track file counts for scan results.

chrome/browser/extensions/api/media_galleries/media_galleries_apitest.cc

 // Copyright (c) 2012 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 "base/auto_reset.h"
 #include "base/file_util.h"
 #include "base/files/scoped_temp_dir.h"
 #include "base/json/json_writer.h"
 #include "base/path_service.h"
 #include "base/safe_numerics.h"
@@ skipping 141 matching lines @@
     MediaGalleryPrefInfo gallery_info;
     ASSERT_FALSE(preferences->LookUpGalleryByPath(fake_gallery_temp_dir_.path(),
                                                   &gallery_info));
     preferences->AddGallery(gallery_info.device_id,
                             gallery_info.path,
                             MediaGalleryPrefInfo::kAutoDetected,
                             gallery_info.volume_label,
                             gallery_info.vendor_name,
                             gallery_info.model_name,
                             gallery_info.total_size_in_bytes,
-                            gallery_info.last_attach_time);
+                            gallery_info.last_attach_time,
+                            0, 0, 0);
 
     content::RunAllPendingInMessageLoop();
 
     base::FilePath test_data_path(GetCommonDataDir());
     base::FilePath write_path = fake_gallery_temp_dir_.path();
 
     // Valid file, should show up in JS as a FileEntry.
     ASSERT_TRUE(base::CopyFile(test_data_path.AppendASCII("test.jpg"),
                                write_path.AppendASCII("test.jpg")));
 
@@ skipping 265 matching lines @@
   PopulateIPhotoTestData(
       ensure_media_directories_exists()->GetFakeIPhotoRootPath());
 
   base::ListValue custom_args;
   custom_args.AppendInteger(test_jpg_size());
   ASSERT_TRUE(RunMediaGalleriesTestWithArg("iphoto", custom_args)) << message_;
 
   iapps::SetMacPreferencesForTesting(NULL);
 }
 #endif  // defined(OS_MACOSX)