Add an option to specify requested fields for fetching metadata.

chrome/browser/media_galleries/fileapi/native_media_file_util.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 "chrome/browser/media_galleries/fileapi/native_media_file_util.h"
 
 #include <string>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
@@ skipping 149 matching lines @@
       FROM_HERE,
       base::Bind(&NativeMediaFileUtil::CreateDirectoryOnTaskRunnerThread,
                  weak_factory_.GetWeakPtr(), base::Passed(&context),
                  url, exclusive, recursive, callback));
   DCHECK(success);
 }
 
 void NativeMediaFileUtil::GetFileInfo(
     scoped_ptr<storage::FileSystemOperationContext> context,
     const storage::FileSystemURL& url,
+    int /* fields */,
     const GetFileInfoCallback& callback) {
   DCHECK_CURRENTLY_ON(content::BrowserThread::IO);
   storage::FileSystemOperationContext* context_ptr = context.get();
   const bool success = context_ptr->task_runner()->PostTask(
       FROM_HERE,
       base::Bind(&NativeMediaFileUtil::GetFileInfoOnTaskRunnerThread,
                  weak_factory_.GetWeakPtr(), base::Passed(&context),
                  url, callback));
   DCHECK(success);
 }
@@ skipping 489 matching lines @@
     return base::File::FILE_ERROR_FAILED;
 
   if (!file_info.is_directory &&
       !media_path_filter_->Match(file_path)) {
     return failure_error;
   }
 
   *local_file_path = file_path;
   return base::File::FILE_OK;
 }