Add field trial config for CSSExternalScanner experiment

Add field trial config for CSSExternalScanner experiment

BUG=596676
Committed: https://crrev.com/90f9f786e88b196d391e6daffb4c9ab7ca7087ab
Cr-Commit-Position: refs/heads/master@{#428146}

[Charlie Harrison, 2016-10-27 17:07:06]

The CQ bit was checked by csharrison@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2016-10-27 17:07:42]

Dry run: CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[Charlie Harrison, 2016-10-27 17:09:42]

csharrison@chromium.org changed reviewers:
+ rkaplow@chromium.org

[Charlie Harrison, 2016-10-27 17:09:44]

Here's the field trial configs for the CSS experiment.

This group enables the scanning + preloading behavior.

[commit-bot: I haz the power, 2016-10-27 18:54:34]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2016-10-27 18:54:35]

Dry run: This issue passed the CQ dry run.

[rkaplow, 2016-10-27 21:20:08]

lgtm

[Charlie Harrison, 2016-10-27 21:20:27]

The CQ bit was checked by csharrison@chromium.org

[commit-bot: I haz the power, 2016-10-27 21:21:11]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-10-27 21:30:43]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-10-27 21:34:04]

Description was changed from

==========
Add field trial config for CSSExternalScanner experiment

BUG=596676
==========

to

==========
Add field trial config for CSSExternalScanner experiment

BUG=596676

Committed: https://crrev.com/90f9f786e88b196d391e6daffb4c9ab7ca7087ab
Cr-Commit-Position: refs/heads/master@{#428146}
==========

[commit-bot: I haz the power, 2016-10-27 21:34:05]

Patchset 1 (id:??) landed as
https://crrev.com/90f9f786e88b196d391e6daffb4c9ab7ca7087ab
Cr-Commit-Position: refs/heads/master@{#428146}