fix: shutdown after message loop is ready (#16671)

spec/api-web-contents-spec.js

@@ -916,13 +916,6 @@ describe('webContents module', () => {
   })
 
   describe('create()', () => {
-    before(function () {
-      // FIXME(jkleinsc): Test is consistently failing on Windows 32 bit.
-      if (process.arch === 'ia32') {
-        this.skip()
-      }
-    })
-
     it('does not crash on exit', async () => {
       const appPath = path.join(__dirname, 'fixtures', 'api', 'leak-exit-webcontents.js')
       const electronPath = remote.getGlobal('process').execPath