src: nw2: Fix close event
src: nw2: Fix close event

https://github.com/nwjs/chromium.src/commit/69844a8f527347a63fb05c7867cb3f7bf1a9169c

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