Build fail on Window nightly CI build

[yrliou]

13:32:54  Entrypoint brave_webtorrent = brave_webtorrent.bundle.js
13:32:54  Entrypoint brave_webtorrent_background = brave_webtorrent_background.bundle.js
13:32:54    [4] (webpack)/buildin/global.js 472 bytes {0} {1} [built]
13:32:54   [26] (webpack)/buildin/module.js 497 bytes {0} {1} [built]
13:32:54   [35] ./components/brave_webtorrent/extension/background/store.ts + 4 modules 13.6 KiB {1} [built]
13:32:54        |    5 modules
13:32:54   [69] ./components/brave_webtorrent/extension/background/actions/tabActions.ts + 1 modules 1.23 KiB {1} [built]
13:32:54        |    2 modules
13:32:54   [94] (webpack)/buildin/harmony-module.js 573 bytes {0} {1} [built]
13:32:54  [405] load-ip-set (ignored) 15 bytes {1} [built]
13:32:54  [456] os (ignored) 15 bytes {1} [built]
13:32:54  [537] ./components/brave_webtorrent/extension/brave_webtorrent.tsx + 50 modules 115 KiB {0} [built]
13:32:54        |    51 modules
13:32:54  [538] ./components/brave_webtorrent/extension/background.ts + 4 modules 2.7 KiB {1} [built]
13:32:54        |    5 modules
13:32:54      + 710 hidden modules
13:32:54  
13:32:54  ERROR in ./node_modules/webtorrent/lib/server.js
13:32:54  Module not found: Error: Can't resolve 'http' in 'C:\jenkins\x86-nightly\src\brave\node_modules\webtorrent\lib'

cc @mihaiplesa