Enable presubmit check for copyrighted material in added / modified code

Enable presubmit check for copyrighted material in added / modified code

This check is already for a long time performed on some of the main
waterfall bots, including "Android Builder (dbg)",
"Android Clang Builder (dbg)", "Android Arm64 Builder (dbg)", and
also on trybots. The step is called "check licenses".

However, it's better to detect issues even earlier, so we did make sure
that the check can run on Windows, and would like to start running it
during presubmit.

Note that the presubmit check is simpler than the bot check, as it only
scans the files for "copyright-like" strings, while the bot check also
verifies that third-party projects contain Android-compatible licenses.

BUG=343104
Committed: https://crrev.com/9b9b1fe81d32f77d3f364ab9a0a0a0cd5d97e829
Cr-Commit-Position: refs/heads/master@{#307908}

[mnaganov (inactive), 2014-12-11 12:47:27]

[email protected] changed reviewers:
+ [email protected]

[mnaganov (inactive), 2014-12-11 12:47:27]

Hi Pawel,

Please take a look at the change -- it just flips the switch to enable the
presubmit check. Please see the bug for the CLs that were adding functionality.

We have unit tests for the checker. I have also manually checked on Linux, Mac
and Windows that the presubmit check works.

[Paweł Hajdan Jr., 2014-12-11 14:39:02]

LGTM

[mnaganov (inactive), 2014-12-11 15:33:02]

The CQ bit was checked by [email protected]

[commit-bot: I haz the power, 2014-12-11 15:34:00]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/788163002/1

[commit-bot: I haz the power, 2014-12-11 16:30:44]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2014-12-11 16:32:42]

Patchset 1 (id:??) landed as
https://crrev.com/9b9b1fe81d32f77d3f364ab9a0a0a0cd5d97e829
Cr-Commit-Position: refs/heads/master@{#307908}