Reland of Split LivenessService out from LibCrosService.

Reland of Split LivenessService out from LibCrosService. (patchset #1 id:1 of https://codereview.chromium.org/2742343004/ )

Reason for revert:
Reverting the revert. Looks like this change is unrelated. https://bugs.chromium.org/p/chromium/issues/detail?id=700823

Original issue's description:
> Revert of Split LivenessService out from LibCrosService. (patchset #3 id:40001 of https://codereview.chromium.org/2741803005/ )
> 
> Reason for revert:
> Speculative revert for failing downstream bots: https://bugs.chromium.org/p/chromium/issues/detail?id=700986
> 
> Original issue's description:
> > Split LivenessService out from LibCrosService.
> > 
> > This is part of a larger effort to split LibCrosService into smaller
> > services for mus+ash.
> > 
> > I've added a TODO to remove the old service once we've migrated
> > clients over to call the new one.
> > 
> > BUG=692246
> > 
> > Review-Url: https://codereview.chromium.org/2741803005
> > Cr-Commit-Position: refs/heads/master@{#456411}
> > Committed: https://chromium.googlesource.com/chromium/src/+/074cfdfc2e36001a72f2e2dfbcd7cc91819221e4
> 
> TBR=derat@chromium.org,teravest@chromium.org
> # Skipping CQ checks because original CL landed less than 1 days ago.
> NOPRESUBMIT=true
> NOTREECHECKS=true
> NOTRY=true
> BUG=692246
> 
> Review-Url: https://codereview.chromium.org/2742343004
> Cr-Commit-Position: refs/heads/master@{#456422}
> Committed: https://chromium.googlesource.com/chromium/src/+/ecf7f3deeb90473ecd3ef116301f0a02637da717

TBR=derat@chromium.org,teravest@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=692246
Review-Url: https://codereview.chromium.org/2748803002
Cr-Commit-Position: refs/heads/master@{#456424}
Committed: https://chromium.googlesource.com/chromium/src/+/b2a374ecdadcd8ebb5f6b9478458725ca25768e0

[Khushal, 2017-03-13 18:01:50]

The CQ bit was checked by khushalsagar@chromium.org

[Khushal, 2017-03-13 18:01:51]

Created Reland of Split LivenessService out from LibCrosService.

[commit-bot: I haz the power, 2017-03-13 18:03:07]

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, 2017-03-13 18:03:58]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1489428110884900, "parent_rev":
"0c28f2c193ac53ef42f488e2ba1858f859bcf2a9", "commit_rev":
"b2a374ecdadcd8ebb5f6b9478458725ca25768e0"}

[commit-bot: I haz the power, 2017-03-13 18:04:37]

Description was changed from

==========
Reland of Split LivenessService out from LibCrosService. (patchset #1 id:1 of
https://codereview.chromium.org/2742343004/ )

Reason for revert:
Reverting the revert. Looks like this change is unrelated.
https://bugs.chromium.org/p/chromium/issues/detail?id=700823

Original issue's description:
> Revert of Split LivenessService out from LibCrosService. (patchset #3 id:40001
of https://codereview.chromium.org/2741803005/ )
> 
> Reason for revert:
> Speculative revert for failing downstream bots:
https://bugs.chromium.org/p/chromium/issues/detail?id=700986
> 
> Original issue's description:
> > Split LivenessService out from LibCrosService.
> > 
> > This is part of a larger effort to split LibCrosService into smaller
> > services for mus+ash.
> > 
> > I've added a TODO to remove the old service once we've migrated
> > clients over to call the new one.
> > 
> > BUG=692246
> > 
> > Review-Url: https://codereview.chromium.org/2741803005
> > Cr-Commit-Position: refs/heads/master@{#456411}
> > Committed:
https://chromium.googlesource.com/chromium/src/+/074cfdfc2e36001a72f2e2dfbcd7...
> 
> TBR=derat@chromium.org,teravest@chromium.org
> # Skipping CQ checks because original CL landed less than 1 days ago.
> NOPRESUBMIT=true
> NOTREECHECKS=true
> NOTRY=true
> BUG=692246
> 
> Review-Url: https://codereview.chromium.org/2742343004
> Cr-Commit-Position: refs/heads/master@{#456422}
> Committed:
https://chromium.googlesource.com/chromium/src/+/ecf7f3deeb90473ecd3ef116301f...

TBR=derat@chromium.org,teravest@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=692246
==========

to

==========
Reland of Split LivenessService out from LibCrosService. (patchset #1 id:1 of
https://codereview.chromium.org/2742343004/ )

Reason for revert:
Reverting the revert. Looks like this change is unrelated.
https://bugs.chromium.org/p/chromium/issues/detail?id=700823

Original issue's description:
> Revert of Split LivenessService out from LibCrosService. (patchset #3 id:40001
of https://codereview.chromium.org/2741803005/ )
> 
> Reason for revert:
> Speculative revert for failing downstream bots:
https://bugs.chromium.org/p/chromium/issues/detail?id=700986
> 
> Original issue's description:
> > Split LivenessService out from LibCrosService.
> > 
> > This is part of a larger effort to split LibCrosService into smaller
> > services for mus+ash.
> > 
> > I've added a TODO to remove the old service once we've migrated
> > clients over to call the new one.
> > 
> > BUG=692246
> > 
> > Review-Url: https://codereview.chromium.org/2741803005
> > Cr-Commit-Position: refs/heads/master@{#456411}
> > Committed:
https://chromium.googlesource.com/chromium/src/+/074cfdfc2e36001a72f2e2dfbcd7...
> 
> TBR=derat@chromium.org,teravest@chromium.org
> # Skipping CQ checks because original CL landed less than 1 days ago.
> NOPRESUBMIT=true
> NOTREECHECKS=true
> NOTRY=true
> BUG=692246
> 
> Review-Url: https://codereview.chromium.org/2742343004
> Cr-Commit-Position: refs/heads/master@{#456422}
> Committed:
https://chromium.googlesource.com/chromium/src/+/ecf7f3deeb90473ecd3ef116301f...

TBR=derat@chromium.org,teravest@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=692246

Review-Url: https://codereview.chromium.org/2748803002
Cr-Commit-Position: refs/heads/master@{#456424}
Committed:
https://chromium.googlesource.com/chromium/src/+/b2a374ecdadcd8ebb5f6b9478458...
==========

[commit-bot: I haz the power, 2017-03-13 18:04:38]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/b2a374ecdadcd8ebb5f6b9478458...