Revert 142427 - Cleaning Up Extensions When Local Content Removed

chrome/common/extensions/extension_file_util.h

Index: chrome/common/extensions/extension_file_util.h
===================================================================
--- chrome/common/extensions/extension_file_util.h	(revision 143046)
+++ chrome/common/extensions/extension_file_util.h	(working copy)
@@ -72,6 +72,19 @@
 // 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(