Add mojo package manager skeleton.

Add mojo package manager skeleton.

This application downloads a URL to a temp file, unzips it, and then cleans everything up.

IN a future pass, we'll extract a manifest and contents of the module.

BUG=
R=ben@chromium.org

Committed: https://chromium.googlesource.com/chromium/src/+/10f9b627cfd2d18045f3e4b33be6cf4c2e545efe

[brettw, 2014-09-23 20:11:07]

brettw@chromium.org changed reviewers:
+ ben@chromium.org

[Ben Goodger (Google), 2014-09-23 22:53:30]

lgtm

[brettw, 2014-09-23 23:13:31]

Committed patchset #2 (id:20001) manually as 10f9b62 (presubmit successful).

[commit-bot: I haz the power, 2014-09-23 23:13:32]

Patchset 2 (id:??) landed as
https://crrev.com/10f9b627cfd2d18045f3e4b33be6cf4c2e545efe
Cr-Commit-Position: refs/heads/master@{#296294}