ImageWriter: Add ShouldResetImageWriter helper

chrome/utility/image_writer/image_writer_handler.h

 // Copyright 2014 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_UTILITY_IMAGE_WRITER_IMAGE_WRITER_HANDLER_H_
 #define CHROME_UTILITY_IMAGE_WRITER_IMAGE_WRITER_HANDLER_H_
 
 #include <stdint.h>
 
 #include <memory>
@@ skipping 23 matching lines @@
   // Methods for sending the different messages back to the |client_|.
   // Generally should be called by image_writer::ImageWriter.
   virtual void SendProgress(int64_t progress);
   virtual void SendSucceeded();
   virtual void SendFailed(const std::string& error);
   virtual void SendCancelled() {}
 
  private:
   void Cancel();
 
+  bool ShouldResetImageWriter(const base::FilePath& image,
+                              const base::FilePath& device);
+
   extensions::mojom::RemovableStorageWriterClientPtr client_;
   std::unique_ptr<ImageWriter> image_writer_;
 };
 
 }  // namespace image_writer
 
 #endif  // CHROME_UTILITY_IMAGE_WRITER_IMAGE_WRITER_HANDLER_H_