| Index: lib/whitelisting.js | 
| diff --git a/lib/whitelisting.js b/lib/whitelisting.js | 
| index 3283952bf860f7db1d853941ef76643db4a8862c..93b737127c84d57f9f01abf3bf36146396028eb9 100644 | 
| --- a/lib/whitelisting.js | 
| +++ b/lib/whitelisting.js | 
| @@ -60,7 +60,7 @@ let checkWhitelisted = | 
| * @param {number} [typeMask=RegExpFilter.typeMap.DOCUMENT] | 
| * @return {?WhitelistFilter} | 
| */ | 
| -exports.checkWhitelisted = function(page, frame, typeMask) | 
| +exports.checkWhitelisted = (page, frame, typeMask) => | 
| { | 
| if (typeof typeMask == "undefined") | 
| typeMask = RegExpFilter.typeMap.DOCUMENT; | 
| @@ -118,7 +118,7 @@ let getKey = | 
| * @param {Frame} frame | 
| * @return {string} | 
| */ | 
| -exports.getKey = function(page, frame) | 
| +exports.getKey = (page, frame) => | 
| { | 
| let keys = sitekeys.get(page); | 
| if (!keys) | 
|  |