client/isolate: add context to NewChecker func

client/isolate: add context to NewChecker func

This make Checker consistent with Uploader, and allows the underyling
context to be cancelled if the isolate process ends early.

Also removes some punctuation from a test case that was upsetting vet.

BUG=598990
R=mcgreevy@chromium.org

Committed: https://github.com/luci/luci-go/commit/8336655396a49a699ff3f7d9abf469ad7b8dd2eb

[mcgreevy, 2016-12-07 05:19:29]

lgtm

[djd-OOO-Apr2017, 2016-12-07 05:30:58]

The CQ bit was checked by djd@chromium.org

[djd-OOO-Apr2017, 2016-12-07 05:30:58]

The patchset sent to the CQ was uploaded after l-g-t-m from
mcgreevy@chromium.org
Link to the patchset: https://codereview.chromium.org/2551973004/#ps20001
(title: "Rebase")

[commit-bot: I haz the power, 2016-12-07 05:31:08]

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, 2016-12-07 05:36:36]

CQ is committing da patch.

Bot data: {"patchset_id": 20001, "attempt_start_ts": 1481088658376280,
"parent_rev": "226173eef159f64d9442d69cc40d8c9ae63b861e", "commit_rev":
"8336655396a49a699ff3f7d9abf469ad7b8dd2eb"}

[commit-bot: I haz the power, 2016-12-07 05:36:39]

Description was changed from

==========
client/isolate: add context to NewChecker func

This make Checker consistent with Uploader, and allows the underyling
context to be cancelled if the isolate process ends early.

Also removes some punctuation from a test case that was upsetting vet.

BUG=598990
R=mcgreevy@chromium.org
==========

to

==========
client/isolate: add context to NewChecker func

This make Checker consistent with Uploader, and allows the underyling
context to be cancelled if the isolate process ends early.

Also removes some punctuation from a test case that was upsetting vet.

BUG=598990
R=mcgreevy@chromium.org

Committed:
https://github.com/luci/luci-go/commit/8336655396a49a699ff3f7d9abf469ad7b8dd2eb
==========

[commit-bot: I haz the power, 2016-12-07 05:36:40]

Committed patchset #2 (id:20001) as
https://github.com/luci/luci-go/commit/8336655396a49a699ff3f7d9abf469ad7b8dd2eb