Make CopyDirectory() not copy the read only bit on Windows.

base/file_util.h

 // Copyright (c) 2012 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.
 
 // This file contains utility functions for dealing with the local
 // filesystem.
 
 #ifndef BASE_FILE_UTIL_H_
 #define BASE_FILE_UTIL_H_
 
@@ skipping 79 matching lines @@
 // if it doesn't exist. Prefer this function over Move when dealing with
 // temporary files. On Windows it preserves attributes of the target file.
 // Returns true on success, leaving *error unchanged.
 // Returns false on failure and sets *error appropriately, if it is non-NULL.
 BASE_EXPORT bool ReplaceFile(const FilePath& from_path,
                              const FilePath& to_path,
                              File::Error* error);
 
 // Copies a single file. Use CopyDirectory to copy directories.
 // This function fails if either path contains traversal components ('..').
+//
+// This function keeps the metadata on OSX and on Windows. The read only bit on
+// Windows is not kept.
 BASE_EXPORT bool CopyFile(const FilePath& from_path, const FilePath& to_path);
 
 // Copies the given path, and optionally all subdirectories and their contents
 // as well.
 //
 // If there are files existing under to_path, always overwrite. Returns true
 // if successful, false otherwise. Wildcards on the names are not supported.
 //
+// This function calls into CopyFile() so the same behavior w.r.t. metadata
+// applies.
+//
 // If you only need to copy a file use CopyFile, it's faster.
 BASE_EXPORT bool CopyDirectory(const FilePath& from_path,
                                const FilePath& to_path,
                                bool recursive);
 
 // Returns true if the given path exists on the local filesystem,
 // false otherwise.
 BASE_EXPORT bool PathExists(const FilePath& path);
 
 // Returns true if the given path is writable by the user, false otherwise.
@@ skipping 338 matching lines @@
 // This function simulates Move(), but unlike Move() it works across volumes.
 // This function is not transactional.
 BASE_EXPORT bool CopyAndDeleteDirectory(const FilePath& from_path,
                                         const FilePath& to_path);
 #endif  // defined(OS_WIN)
 
 }  // namespace internal
 }  // namespace base
 
 #endif  // BASE_FILE_UTIL_H_