Require confirmation for writable directory access.

chrome/common/extensions/permissions/api_permission.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_PERMISSIONS_API_PERMISSION_H_
 #define CHROME_COMMON_EXTENSIONS_PERMISSIONS_API_PERMISSION_H_
 
 #include <map>
 #include <set>
 #include <string>
@@ skipping 64 matching lines @@
     kEnterprisePlatformKeysPrivate,
     kExperimental,
     kFeedbackPrivate,
     kFileBrowserHandler,
     kFileBrowserHandlerInternal,
     kFileBrowserPrivate,
     kFileSystem,
     kFileSystemDirectory,
     kFileSystemRetainEntries,
     kFileSystemWrite,
+    kFileSystemWriteDirectory,

[not at google - send to devlin, 2013/09/03 17:07:04]

(you do need this)

     kFontSettings,
     kFullscreen,
     kGeolocation,
     kHistory,
     kIdentity,
     kIdentityPrivate,
     kIdle,
     kInfobars,
     kInput,
     kInputMethodPrivate,
@@ skipping 219 matching lines @@
   const char* const name_;
   const int flags_;
   const int l10n_message_id_;
   const PermissionMessage::ID message_id_;
   const APIPermissionConstructor api_permission_constructor_;
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_COMMON_EXTENSIONS_PERMISSIONS_API_PERMISSION_H_