Implement DeleteFile and DeleteDirectory.

chrome/browser/media_galleries/fileapi/mtp_device_async_delegate.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_MTP_DEVICE_ASYNC_DELEGATE_H_
 #define CHROME_BROWSER_MEDIA_GALLERIES_FILEAPI_MTP_DEVICE_ASYNC_DELEGATE_H_
 
 #include "base/callback.h"
 #include "base/files/file.h"
 #include "base/memory/ref_counted.h"
@@ skipping 48 matching lines @@
     scoped_refptr<net::IOBuffer> buf;
     int64 offset;
     int buf_len;
     ReadBytesSuccessCallback success_callback;
     ErrorCallback error_callback;
   };
 
   // A callback to be called when CopyFileFromLocal method call succeeds.
   typedef base::Closure CopyFileFromLocalSuccessCallback;
 
+  // A callback to be called when DeleteFile method call succeeds.
+  typedef base::Closure DeleteFileSuccessCallback;
+
+  // A callback to be called when DeleteDirectory method call succeeds.
+  typedef base::Closure DeleteDirectorySuccessCallback;
+
   // Gets information about the given |file_path| and invokes the appropriate
   // callback asynchronously when complete.
   virtual void GetFileInfo(
       const base::FilePath& file_path,
       const GetFileInfoSuccessCallback& success_callback,
       const ErrorCallback& error_callback) = 0;
 
   // Enumerates the |root| directory contents and invokes the appropriate
   // callback asynchronously when complete.
   virtual void ReadDirectory(
@@ skipping 17 matching lines @@
   // appropriate callback asynchronously when complete. Only valid when
   // IsStreaming() is true.
   virtual void ReadBytes(const base::FilePath& device_file_path,
                          const scoped_refptr<net::IOBuffer>& buf,
                          int64 offset,
                          int buf_len,
                          const ReadBytesSuccessCallback& success_callback,
                          const ErrorCallback& error_callback) = 0;
 
   // Returns true if storage is opened for read only.
-  virtual bool IsReadOnly() = 0;
+  virtual bool IsReadOnly() const = 0;
 
   // Copies a file from |source_file_path| to |device_file_path|.
   virtual void CopyFileFromLocal(
       const base::FilePath& source_file_path,
       const base::FilePath& device_file_path,
       const CopyFileFromLocalSuccessCallback& success_callback,
       const ErrorCallback& error_callback) = 0;
 
+  // Deletes a file at |file_path|.
+  virtual void DeleteFile(const base::FilePath& file_path,
+                          const DeleteFileSuccessCallback& success_callback,
+                          const ErrorCallback& error_callback) = 0;
+
+  // Deletes a directory at |file_path|. The directory must be empty.
+  virtual void DeleteDirectory(
+      const base::FilePath& file_path,
+      const DeleteDirectorySuccessCallback& success_callback,
+      const ErrorCallback& error_callback) = 0;
+
   // Called when the
   // (1) Browser application is in shutdown mode (or)
   // (2) Last extension using this MTP device is destroyed (or)
   // (3) Attached MTP device is removed (or)
   // (4) User revoked the MTP device gallery permission.
   // Ownership of |MTPDeviceAsyncDelegate| is handed off to the delegate
   // implementation class by this call. This function should take care of
   // cancelling all the pending tasks before deleting itself.
   virtual void CancelPendingTasksAndDeleteDelegate() = 0;
 
  protected:
   // Always destruct this object via CancelPendingTasksAndDeleteDelegate().
   virtual ~MTPDeviceAsyncDelegate() {}
 };
 
 typedef base::Callback<void(MTPDeviceAsyncDelegate*)>
     CreateMTPDeviceAsyncDelegateCallback;
 
 void CreateMTPDeviceAsyncDelegate(
     const base::FilePath::StringType& device_location,
     const bool read_only,
     const CreateMTPDeviceAsyncDelegateCallback& callback);
 
 #endif  // CHROME_BROWSER_MEDIA_GALLERIES_FILEAPI_MTP_DEVICE_ASYNC_DELEGATE_H_