Add an option to specify requested fields for fetching metadata.

chrome/browser/media_galleries/fileapi/device_media_async_file_util.h

 // Copyright (c) 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.
 
 #ifndef CHROME_BROWSER_MEDIA_GALLERIES_FILEAPI_DEVICE_MEDIA_ASYNC_FILE_UTIL_H_
 #define CHROME_BROWSER_MEDIA_GALLERIES_FILEAPI_DEVICE_MEDIA_ASYNC_FILE_UTIL_H_
 
 #include "base/files/file.h"
 #include "base/files/file_path.h"
 #include "base/memory/ref_counted.h"
@@ skipping 36 matching lines @@
   void EnsureFileExists(scoped_ptr<storage::FileSystemOperationContext> context,
                         const storage::FileSystemURL& url,
                         const EnsureFileExistsCallback& callback) override;
   void CreateDirectory(scoped_ptr<storage::FileSystemOperationContext> context,
                        const storage::FileSystemURL& url,
                        bool exclusive,
                        bool recursive,
                        const StatusCallback& callback) override;
   void GetFileInfo(scoped_ptr<storage::FileSystemOperationContext> context,
                    const storage::FileSystemURL& url,
+                   int /* flags */,
                    const GetFileInfoCallback& callback) override;
   void ReadDirectory(scoped_ptr<storage::FileSystemOperationContext> context,
                      const storage::FileSystemURL& url,
                      const ReadDirectoryCallback& callback) override;
   void Touch(scoped_ptr<storage::FileSystemOperationContext> context,
              const storage::FileSystemURL& url,
              const base::Time& last_access_time,
              const base::Time& last_modified_time,
              const StatusCallback& callback) override;
   void Truncate(scoped_ptr<storage::FileSystemOperationContext> context,
@@ skipping 118 matching lines @@
 
   scoped_refptr<MediaPathFilterWrapper> media_path_filter_wrapper_;
 
   // For callbacks that may run after destruction.
   base::WeakPtrFactory<DeviceMediaAsyncFileUtil> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(DeviceMediaAsyncFileUtil);
 };
 
 #endif  // CHROME_BROWSER_MEDIA_GALLERIES_FILEAPI_DEVICE_MEDIA_ASYNC_FILE_UTIL_H_