src: Fix macOS build on msg loop
src: Fix macOS build on msg loop

https://github.com/nwjs/chromium.src/commit/3620c01988d5da88f29704bf4d79d4912232cdca

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