Stop including flash in the archive on Windows.

Also fix a stale comment or two.

TEST=https://docs.google.com/document/d/1P0WslUXMUO9azLmWZ0AtQ-sGExWbHttr_2gQWDXf3MY/edit#
BUG=624086

Review-Url: https://codereview.chromium.org/2251923002
Cr-Commit-Position: refs/heads/master@{#414019}
2 files changed