message: Don't LOG(INFO) process exit status
  AFAICT this was just a leftover logging statement.
diff: @@ -305,8 +305,6 @@ bool SubProcess::WaitInternal(int* status) {
  if (wait_status == WAIT_OBJECT_0) {
  DWORD process_exit_code = 0;
  if (GetExitCodeProcess(pi_.hProcess, &process_exit_code)) {
  - LOG(INFO) << "SubProcess ended with return code: " << process_exit_code
  - << std::endl;
  *status = static_cast<int>(process_exit_code);
  } else {
  LOG(FATAL) << "Wait failed with code: " << GetLastError();
  