Add a flag to ChromeVox upload script for direct publish without interactive mode.

- -p or --publish will now upload and publish.
- only request auth code and oauth token once each (reuse as needed for subsequent calls).
- try closing some more of the httpd socket connections.

Review URL: https://codereview.chromium.org/927543003

Cr-Commit-Position: refs/heads/master@{#317463}
2 files changed