logdog: Use gRPC credentials when creating PubSub client, not http.Client.

logdog: Use gRPC credentials when creating PubSub client, not http.Client.

http.Client is not supported by PubSub lib anymore.

R=dnj@chromium.org
BUG=675401
Review-Url: https://codereview.chromium.org/2582253002
Committed: https://github.com/luci/luci-go/commit/9d5021772cca20e36f0792434a790f4fb851ca03

[Vadim Sh., 2016-12-18 01:47:54]

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

[commit-bot: I haz the power, 2016-12-18 01:48:01]

Dry run: 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, 2016-12-18 01:49:32]

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

[commit-bot: I haz the power, 2016-12-18 01:49:33]

Dry run: Try jobs failed on following builders:
  Luci-go Linux Trusty 64 Tester on luci.infra.try (JOB_FAILED,
https://luci-milo.appspot.com/swarming/task/33286ef46a98d310)
  Luci-go Presubmit on luci.infra.try (JOB_FAILED,
https://luci-milo.appspot.com/swarming/task/33286ef43de14d10)
  Luci-go Win Tester on luci.infra.try (JOB_FAILED,
https://luci-milo.appspot.com/swarming/task/33286ef7f02f1210)

[dnj, 2016-12-18 15:52:00]

The CQ bit was checked by dnj@chromium.org

[dnj, 2016-12-18 15:52:00]

lgtm

[commit-bot: I haz the power, 2016-12-18 15:52:06]

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, 2016-12-18 15:57:43]

CQ is committing da patch.

Bot data: {"patchset_id": 40001, "attempt_start_ts": 1482076320469790,
"parent_rev": "59f609f413c163903df780f4d52f1528962d7d92", "commit_rev":
"9d5021772cca20e36f0792434a790f4fb851ca03"}

[commit-bot: I haz the power, 2016-12-18 15:57:46]

Description was changed from

==========
logdog: Use gRPC credentials when creating PubSub client, not http.Client.

http.Client is not supported by PubSub lib anymore.

R=dnj@chromium.org
BUG=675401
==========

to

==========
logdog: Use gRPC credentials when creating PubSub client, not http.Client.

http.Client is not supported by PubSub lib anymore.

R=dnj@chromium.org
BUG=675401

Review-Url: https://codereview.chromium.org/2582253002
Committed:
https://github.com/luci/luci-go/commit/9d5021772cca20e36f0792434a790f4fb851ca03
==========

[commit-bot: I haz the power, 2016-12-18 15:57:47]

Committed patchset #3 (id:40001) as
https://github.com/luci/luci-go/commit/9d5021772cca20e36f0792434a790f4fb851ca03