Re-Re-land: Add download_file_types.proto with ascii->binary conversion, as a resource.

This reverts commit 90ade35dd2736cc1fa3eb9fc67e83640345b519b
Adds: -S -s args to /usr/bin/python

BUG=596555

Review URL: https://codereview.chromium.org/1917653002

Cr-Commit-Position: refs/heads/master@{#389612}
10 files changed