Add support for persistent file access in apps.

chrome/common/extensions/permissions/chrome_api_permissions.cc

 // Copyright (c) 2013 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/common/extensions/permissions/chrome_api_permissions.h"
 
 #include "chrome/common/extensions/permissions/api_permission.h"
 #include "chrome/common/extensions/permissions/api_permission_set.h"
 #include "chrome/common/extensions/permissions/bluetooth_device_permission.h"
 #include "chrome/common/extensions/permissions/media_galleries_permission.h"
@@ skipping 208 matching lines @@
       PermissionMessage::kAudioCapture },
     { APIPermission::kVideoCapture, "videoCapture",
       APIPermissionInfo::kFlagNone,
       IDS_EXTENSION_PROMPT_WARNING_VIDEO_CAPTURE,
       PermissionMessage::kVideoCapture },
     // The permission string for "fileSystem" is only shown when "write" is
     // present. Read-only access is only granted after the user has been shown
     // a file chooser dialog and selected a file. Selecting the file is
     // considered consent to read it.
     { APIPermission::kFileSystem, "fileSystem" },
+    { APIPermission::kFileSystemRetainFiles, "fileSystem.retainFiles" },
     { APIPermission::kFileSystemWrite, "fileSystem.write",
       APIPermissionInfo::kFlagNone,
       IDS_EXTENSION_PROMPT_WARNING_FILE_SYSTEM_WRITE,
       PermissionMessage::kFileSystemWrite },
     // Because warning messages for the "mediaGalleries" permission vary based
     // on the permissions parameters, no message ID or message text is
     // specified here.
     // The message ID and text used will be determined at run-time in the
     // |MediaGalleriesPermission| class.
     { APIPermission::kMediaGalleries, "mediaGalleries",
@@ skipping 42 matching lines @@
   // Register aliases.
   std::vector<PermissionsInfo::AliasInfo> aliases;
   aliases.push_back(PermissionsInfo::AliasInfo(
       "unlimitedStorage", kOldUnlimitedStoragePermission));
   aliases.push_back(PermissionsInfo::AliasInfo(
       "tabs", kWindowsPermission));
   return aliases;
 }
 
 }  // namespace extensions