Avoid a platform-specific errno in pub_serve_test.
Avoid a platform-specific errno in pub_serve_test.

R=kevmoo@google.com

Review URL: https://codereview.chromium.org//1061903006

greglittlefield-wf/test,kevmoo/test,iglherme/Guttiest,d2m/test,greglittlefield-wf/test,iglherme/Guttiest,kevmoo/test,apwilson/test,d2m/test,grouma/test,grouma/test,grouma/test,apwilson/test,greglittlefield-wf/test,apwilson/test,iglherme/Guttiest,kevmoo/test,d2m/test