Implement DeleteFile and DeleteDirectory.

chrome/browser/media_galleries/win/mtp_device_delegate_impl_win.h

Index: chrome/browser/media_galleries/win/mtp_device_delegate_impl_win.h
diff --git a/chrome/browser/media_galleries/win/mtp_device_delegate_impl_win.h b/chrome/browser/media_galleries/win/mtp_device_delegate_impl_win.h
index f0da9381000729fee68efe61730df7bdd74dc0b2..ad65668f17f731909962bd38661a89307d3895e4 100644
--- a/chrome/browser/media_galleries/win/mtp_device_delegate_impl_win.h
+++ b/chrome/browser/media_galleries/win/mtp_device_delegate_impl_win.h
@@ -110,12 +110,18 @@ class MTPDeviceDelegateImplWin : public MTPDeviceAsyncDelegate {
                          int buf_len,
                          const ReadBytesSuccessCallback& success_callback,
                          const ErrorCallback& error_callback) override;
-  bool IsReadOnly() override;
+  bool IsReadOnly() const override;
   void CopyFileFromLocal(
       const base::FilePath& source_file_path,
       const base::FilePath& device_file_path,
       const CopyFileFromLocalSuccessCallback& success_callback,
       const ErrorCallback& error_callback) override;
+  void DeleteFile(const base::FilePath& file_path,
+                  const DeleteFileSuccessCallback& success_callback,
+                  const ErrorCallback& error_callback) override;
+  void DeleteDirectory(const base::FilePath& file_path,
+                       const DeleteDirectorySuccessCallback& success_callback,
+                       const ErrorCallback& error_callback) override;
   virtual void CancelPendingTasksAndDeleteDelegate() override;
 
   // Ensures the device is initialized for communication by doing a