Revert 142427 - Cleaning Up Extensions When Local Content Removed

chrome/common/extensions/extension_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.
 
 #ifndef CHROME_COMMON_EXTENSIONS_EXTENSION_FILE_UTIL_H_
 #define CHROME_COMMON_EXTENSIONS_EXTENSION_FILE_UTIL_H_
 #pragma once
 
 #include <string>
 #include <map>
@@ skipping 54 matching lines @@
 //
 // Otherwise, returns false, and a description of the error is
 // returned in |error|.
 bool ValidateExtension(const extensions::Extension* extension,
                        std::string* error,
                        extensions::Extension::InstallWarningVector* warnings);
 
 // Returns a list of files that contain private keys inside |extension_dir|.
 std::vector<FilePath> FindPrivateKeyFiles(const FilePath& extension_dir);
 
+// Cleans up the extension install directory. It can end up with garbage in it
+// if extensions can't initially be removed when they are uninstalled (eg if a
+// file is in use).
+//
+// |extensions_dir| is the install directory to look in. |extension_paths| is a
+// map from extension id to full installation path.
+//
+// Obsolete version directories are removed, as are directories that aren't
+// found in |extension_paths|.
+void GarbageCollectExtensions(
+    const FilePath& extensions_dir,
+    const std::map<std::string, FilePath>& extension_paths);
+
 // Loads extension message catalogs and returns message bundle.
 // Returns NULL on error, or if extension is not localized.
 ExtensionMessageBundle* LoadExtensionMessageBundle(
     const FilePath& extension_path,
     const std::string& default_locale,
     std::string* error);
 
 // Loads the extension message bundle substitution map. Contains at least
 // extension_id item.
 ExtensionMessageBundle::SubstitutionMap*
@@ skipping 23 matching lines @@
 FilePath GetUserDataTempDir();
 
 // Helper function to delete files. This is used to avoid ugly casts which
 // would be necessary with PostMessage since file_util::Delete is overloaded.
 // TODO(skerner): Make a version of Delete that is not overloaded in file_util.
 void DeleteFile(const FilePath& path, bool recursive);
 
 }  // namespace extension_file_util
 
 #endif  // CHROME_COMMON_EXTENSIONS_EXTENSION_FILE_UTIL_H_