src: sync up with nw46 branch
src: sync up with nw46 branch

https://github.com/nwjs/chromium.src/commit/f0b97cd582ac61f692ea1a155b2fb977b9c9463d

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