I've just read the section about distributing at the wiki of nw.js
And since the binary is based on Chromium, multiple open source license > notices are needed including the MIT License, the LGPL, the BSD, the Ms-PL and an MPL/GPL/LGPL tri-license. (This doesn't apply to your code and you don't have to open source your code)
but I don't know where to find the licensing information I shall include for chromium . Or do I have to ship the general text of the mentioned licenses without any copyright information ?