Filter out hidden files, both when loading extensions and when

chrome/browser/extensions/extension_file_util.cc

 // Copyright (c) 2009 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.
 
 #include "chrome/browser/extensions/extension_file_util.h"
 
 #include "app/l10n_util.h"
 #include "base/file_util.h"
 #include "base/logging.h"
 #include "base/scoped_temp_dir.h"
@@ skipping 366 matching lines @@
                                              app_locale,
                                              locales,
                                              error);
   return message_bundle;
 }
 
 bool CheckForIllegalFilenames(const FilePath& extension_path,
                               std::string* error) {
   // Reserved underscore names.
   static const char* reserved_names[] = {
-    Extension::kLocaleFolder
+    Extension::kLocaleFolder,
+    "__MACOSX"
   };
   static std::set<std::string> reserved_underscore_names(
     reserved_names, reserved_names + arraysize(reserved_names));
 
   // Enumerate all files and directories in the extension root.
   // There is a problem when using pattern "_*" with FileEnumerator, so we have
   // to cheat with find_first_of and match all.
   file_util::FileEnumerator all_files(
     extension_path,
     false,
@@ skipping 14 matching lines @@
         "Filenames starting with \"_\" are reserved for use by the system.",
         filename.c_str());
       return false;
     }
   }
 
   return true;
 }
 
 }  // namespace extension_file_util