src: sync with nw40 branch
src: sync with nw40 branch

https://github.com/nwjs/chromium.src/commit/b915ee5d76cd3a9ceb772e7edf49d79c9d8f48bc

nwjs/nw.js,nwjs/nw.js,nwjs/nw.js,nwjs/nw.js,nwjs/nw.js,nwjs/nw.js