[FileSystem] Add another copy-or-move validation hook for post-write.

webkit/browser/fileapi/copy_or_move_file_validator.h

Index: webkit/browser/fileapi/copy_or_move_file_validator.h
diff --git a/webkit/browser/fileapi/copy_or_move_file_validator.h b/webkit/browser/fileapi/copy_or_move_file_validator.h
index 9b32f5b8d3b101f81caae0d29038d76fb6ebd289..75462b3a00869f865a208b07651e177c44149146 100644
--- a/webkit/browser/fileapi/copy_or_move_file_validator.h
+++ b/webkit/browser/fileapi/copy_or_move_file_validator.h
@@ -25,7 +25,19 @@ class WEBKIT_STORAGE_BROWSER_EXPORT CopyOrMoveFileValidator {
 
   virtual ~CopyOrMoveFileValidator() {}
 
+  // Called on a source file before copying or moving to the final
+  // destination.
   virtual void StartValidation(const ResultCallback& result_callback) = 0;
+
+  // Called on a destination file after copying or moving to the final
+  // destination. Suitable for running Anti-Virus checks. The |file_ref| is
+  // a refcounted keepalive token for the destination file which may or
+  // may not be present. Implementations should maintain the |file_ref| until

[kinuko, 2013/07/12 05:00:19]

This comment also needs to be updated?

[Greg Billock, 2013/07/12 18:02:19]

Done.

+  // they finish and return in order to make sure the file is not prematurely
+  // deleted from under them.
+  virtual void StartPostWriteValidation(
+      const base::FilePath& dest_platform_path,
+      const ResultCallback& result_callback) = 0;
 };
 
 class CopyOrMoveFileValidatorFactory {