Unmounts volumes before writing to a drive.

chrome/browser/extensions/api/image_writer_private/operation.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_EXTENSIONS_API_IMAGE_WRITER_PRIVATE_OPERATION_H_
 #define CHROME_BROWSER_EXTENSIONS_API_IMAGE_WRITER_PRIVATE_OPERATION_H_
 
 #include "base/callback.h"
 #include "base/files/file.h"
 #include "base/files/scoped_temp_dir.h"
@@ skipping 146 matching lines @@
   // shutdown.
   void StopUtilityClient();
 
   // Reports progress from the client, transforming from bytes to percentage.
   virtual void WriteImageProgress(int64 total_bytes, int64 curr_bytes);
 
   scoped_refptr<ImageWriterUtilityClient> image_writer_client_;
 #endif
 
 #if defined(OS_CHROMEOS)
-  void StartWriteOnUIThread(const base::Closure& continuation);
-
+  // Unmounts the volumes associated with device_path.
+  void UnmountVolumes(const base::Closure& continuation);
+  // Starts the write after unmounting.
+  void UnmountVolumesCallback(const base::Closure& continuation, bool success);
+  // Starts the ImageBurner write.  Note that target_path is the file path of
+  // the device where device_path has been a system device path.
+  void StartWriteOnUIThread(const std::string& target_path,
+                            const base::Closure& continuation);
   void OnBurnFinished(const base::Closure& continuation,
                       const std::string& target_path,
                       bool success,
                       const std::string& error);
   void OnBurnProgress(const std::string& target_path,
                       int64 num_bytes_burnt,
                       int64 total_size);
   void OnBurnError();
 #endif
 
@@ skipping 26 matching lines @@
 
   // CleanUp operations that must be run.  All these functions are run on the
   // FILE thread.
   std::vector<base::Closure> cleanup_functions_;
 };
 
 }  // namespace image_writer
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_API_IMAGE_WRITER_PRIVATE_OPERATION_H_