Implement DeleteFile and DeleteDirectory.

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 127 matching lines @@
   void OnDidReadDirectory(
       base::SequencedTaskRunner* task_runner,
       const ReadDirectoryCallback& callback,
       const EntryList& file_list,
       bool has_more);
 
   // Called when CopyInForeignFile method call succeeds. |callback| is invoked
   // to complete the CopyInForeignFile request.
   void OnDidCopyInForeignFile(const StatusCallback& callback);
 
+  // Called when DeleteFile method call succeeeds. |callback| is invoked to
+  // complete the DeleteFile request.
+  void OnDidDeleteFile(const StatusCallback& callback);
+
+  // Called when DeleteDirectory method call succeeds. |callback| is invoked to
+  // complete the DeleteDirectory request.
+  void OnDidDeleteDirectory(const StatusCallback& callback);
+
   bool validate_media_files() const;
 
   // Profile path.
   const base::FilePath profile_path_;
 
   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_