message: Do not use libevent when targeting wasm.
  Cr-Commit-Position: refs/heads/master@{#28329}
diff: @@ -221,7 +221,8 @@ declare_args() {
  rtc_build_usrsctp = !build_with_mozilla
  # Enable libevent task queues on platforms that support it.
  - if (is_win || is_mac || is_ios || is_nacl || is_fuchsia) {
  + if (is_win || is_mac || is_ios || is_nacl || is_fuchsia ||
  + target_cpu == "wasm") {
  rtc_enable_libevent = false
  rtc_build_libevent = false
  } else {
  