Add mb config for chromium.swarm canary builders.

Add mb config for chromium.swarm canary builders.

These are very basic builders used to run chromium tests on swarming's
staging server. I copied the configs from master.chromium, which seems
pretty vanilla.

BUG=674667
Review-Url: https://codereview.chromium.org/2690163007
Cr-Commit-Position: refs/heads/master@{#450839}
Committed: https://chromium.googlesource.com/chromium/src/+/959e7a60e84fa150bbb8a90b302bbaed4a4071b4

[bpastene, 2017-02-15 19:52:24]

bpastene@chromium.org changed reviewers:
+ dpranke@chromium.org

[Dirk Pranke, 2017-02-15 20:10:51]

lgtm

[bpastene, 2017-02-15 20:30:20]

The CQ bit was checked by bpastene@chromium.org

[commit-bot: I haz the power, 2017-02-15 20:33:26]

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, 2017-02-16 00:11:03]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1487190620825180, "parent_rev":
"670f99acf274880aadc1b1c38667bd8e329e5003", "commit_rev":
"959e7a60e84fa150bbb8a90b302bbaed4a4071b4"}

[commit-bot: I haz the power, 2017-02-16 00:11:38]

Description was changed from

==========
Add mb config for chromium.swarm canary builders.

These are very basic builders used to run chromium tests on swarming's
staging server. I copied the configs from master.chromium, which seems
pretty vanilla.

BUG=674667
==========

to

==========
Add mb config for chromium.swarm canary builders.

These are very basic builders used to run chromium tests on swarming's
staging server. I copied the configs from master.chromium, which seems
pretty vanilla.

BUG=674667

Review-Url: https://codereview.chromium.org/2690163007
Cr-Commit-Position: refs/heads/master@{#450839}
Committed:
https://chromium.googlesource.com/chromium/src/+/959e7a60e84fa150bbb8a90b302b...
==========

[commit-bot: I haz the power, 2017-02-16 00:11:39]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/959e7a60e84fa150bbb8a90b302b...