Add stubs for brailleDisplayPrivate extension API.

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 31 matching lines @@
     kAppCurrentWindowInternal,
     kAppRuntime,
     kAppWindow,
     kAudio,
     kAudioCapture,
     kAutoTestPrivate,
     kBackground,
     kBluetooth,
     kBookmark,
     kBookmarkManagerPrivate,
+    kBrailleDisplayPrivate,
     kBrowsingData,
     kChromeosInfoPrivate,
     kClipboardRead,
     kClipboardWrite,
     kCloudPrintPrivate,
     kCommandLinePrivate,
     kContentSettings,
     kContextMenus,
     kCookie,
     kDiagnostics,
@@ skipping 253 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_