Implement DeleteFile and DeleteDirectory.

chrome/browser/media_galleries/linux/mtp_device_task_helper.h

 // 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.
 
 #ifndef CHROME_BROWSER_MEDIA_GALLERIES_LINUX_MTP_DEVICE_TASK_HELPER_H_
 #define CHROME_BROWSER_MEDIA_GALLERIES_LINUX_MTP_DEVICE_TASK_HELPER_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 20 matching lines @@
   typedef MTPDeviceAsyncDelegate::GetFileInfoSuccessCallback
       GetFileInfoSuccessCallback;
 
   // NOTE: The file names in the entry list have their file id appended at the
   // end. e.g. foo.jpg with file id 45 becomes foo.jpg,45.
   typedef base::Callback<void(const storage::AsyncFileUtil::EntryList& entries,
                               bool has_more)> ReadDirectorySuccessCallback;
 
   typedef base::Closure CopyFileFromLocalSuccessCallback;
 
+  typedef base::Closure DeleteObjectSuccessCallback;
+
   typedef MTPDeviceAsyncDelegate::ErrorCallback ErrorCallback;
 
   MTPDeviceTaskHelper();
   ~MTPDeviceTaskHelper();
 
   // Dispatches the request to the MediaTransferProtocolManager to open the MTP
   // storage for communication.
   //
   // |storage_name| specifies the name of the storage device.
   // |callback| is called when the OpenStorage request completes. |callback|
@@ skipping 20 matching lines @@
   // |dir_id| specifies the directory id.
   //
   // If the directory file entries are enumerated successfully,
   // |success_callback| is invoked on the IO thread to notify the caller about
   // the directory file entries. Please see the note in the
   // ReadDirectorySuccessCallback typedef regarding the special treatment of
   // file names.
   //
   // If there is an error, |error_callback| is invoked on the IO thread to
   // notify the caller about the file error.
-  void ReadDirectory(uint32 dir_id,
+  void ReadDirectory(const uint32 directory_id,
+                     const size_t max_size,
                      const ReadDirectorySuccessCallback& success_callback,
                      const ErrorCallback& error_callback);
 
   // Forwards the WriteDataIntoSnapshotFile request to the MTPReadFileWorker
   // object.
   //
   // |request_info| specifies the snapshot file request params.
   // |snapshot_file_info| specifies the metadata of the snapshot file.
   void WriteDataIntoSnapshotFile(
       const SnapshotRequestInfo& request_info,
       const base::File::Info& snapshot_file_info);
 
   // Dispatches the read bytes request to the MediaTransferProtocolManager.
   //
   // |request| contains details about the byte request including the file path,
   // byte range, and the callbacks. The callbacks specified within |request| are
   // called on the IO thread to notify the caller about success or failure.
   void ReadBytes(const MTPDeviceAsyncDelegate::ReadBytesRequest& request);
 
   // Forwards CopyFileFromLocal request to the MediaTransferProtocolManager.
   void CopyFileFromLocal(
       const std::string& storage_name,
       const int source_file_descriptor,
       const uint32 parent_id,
       const std::string& file_name,
       const CopyFileFromLocalSuccessCallback& success_callback,
       const ErrorCallback& error_callback);
 
+  // Forwards DeleteObject request to the MediaTransferProtocolManager.
+  void DeleteObject(const uint32 object_id,
+                    const DeleteObjectSuccessCallback& success_callback,
+                    const ErrorCallback& error_callback);
+
   // Dispatches the CloseStorage request to the MediaTransferProtocolManager.
   void CloseStorage() const;
 
  private:
   // Query callback for OpenStorage() to run |callback| on the IO thread.
   //
   // If OpenStorage request succeeds, |error| is set to false and
   // |device_handle| contains the handle to communicate with the MTP device.
   //
   // If OpenStorage request fails, |error| is set to true and |device_handle| is
@@ skipping 44 matching lines @@
   //
   // If there is an error, |error| is set to true, the buffer within |request|
   // is untouched, and the error callback within |request| is invoked on the
   // IO thread to notify the caller.
   void OnDidReadBytes(
       const MTPDeviceAsyncDelegate::ReadBytesRequest& request,
       const base::File::Info& file_info,
       const std::string& data,
       bool error) const;
 
-  // Called when CopyFileFromLocal completed no matter if it succeeded or
-  // failed.
+  // Called when CopyFileFromLocal completes.
   void OnCopyFileFromLocal(
       const CopyFileFromLocalSuccessCallback& success_callback,
       const ErrorCallback& error_callback,
       const bool error) const;
 
+  // Called when DeleteObject completes.
+  void OnDeleteObject(const DeleteObjectSuccessCallback& success_callback,
+                      const ErrorCallback& error_callback,
+                      const bool error) const;
+
   // Called when the device is uninitialized.
   //
   // Runs |error_callback| on the IO thread to notify the caller about the
   // device |error|.
   void HandleDeviceError(const ErrorCallback& error_callback,
                          base::File::Error error) const;
 
   // Handle to communicate with the MTP device.
   std::string device_handle_;
 
   // Used to handle WriteDataInfoSnapshotFile request.
   scoped_ptr<MTPReadFileWorker> read_file_worker_;
 
   // For callbacks that may run after destruction.
   base::WeakPtrFactory<MTPDeviceTaskHelper> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(MTPDeviceTaskHelper);
 };
 
 #endif  // CHROME_BROWSER_MEDIA_GALLERIES_LINUX_MTP_DEVICE_TASK_HELPER_H_