Unpack extensions inside chrome's directory.

base/file_util.h

 // Copyright (c) 2010 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 231 matching lines @@
 // Like above but for shmem files.  Only useful for POSIX.
 FILE* CreateAndOpenTemporaryShmemFile(FilePath* path);
 
 // Similar to CreateAndOpenTemporaryFile, but the file is created in |dir|.
 FILE* CreateAndOpenTemporaryFileInDir(const FilePath& dir, FilePath* path);
 
 // Same as CreateTemporaryFile but the file is created in |dir|.
 bool CreateTemporaryFileInDir(const FilePath& dir,
                               FilePath* temp_file);
 
+// Create a directory within another directory.
+// Extra characters will be appended to |name_tmpl| to ensure that the
+// new directory does not have the same name as an existing directory.
+bool CreateTemporaryDirInDir(const FilePath& base_dir,
+                             const FilePath::StringType& prefix,
+                             FilePath* new_dir);
+
 // Create a new directory under TempPath. If prefix is provided, the new
 // directory name is in the format of prefixyyyy.
 // NOTE: prefix is ignored in the POSIX implementation.
 // TODO(erikkay): is this OK?
 // If success, return true and output the full path of the directory created.
 bool CreateNewTempDirectory(const FilePath::StringType& prefix,
                             FilePath* new_temp_path);
 
 // Creates a directory, as well as creating any parent directories, if they
 // don't exist. Returns 'true' on successful creation, or if the directory
@@ skipping 299 matching lines @@
 
 #endif  // UNIT_TEST
 
 }  // namespace file_util
 
 // Deprecated functions have been moved to this separate header file,
 // which must be included last after all the above definitions.
 #include "base/file_util_deprecated.h"
 
 #endif  // BASE_FILE_UTIL_H_