Revert of Add a CHECK for null stuff in CompactPendingRules

Revert of Add a CHECK for null stuff in CompactPendingRules (patchset #2 id:20001 of https://codereview.chromium.org/2740013002/ )

Reason for revert:
Reverting as I finish up my investigation.

Original issue's description:
> Add a CHECK for null stuff in CompactPendingRules
> 
> This should be impossible, but we'd like to try it in canary
> to try and figure out what's going on in the linked bug.
> 
> This should be reverted by 17 March.
> 
> BUG=694520
> 
> Review-Url: https://codereview.chromium.org/2740013002
> Cr-Commit-Position: refs/heads/master@{#455697}
> Committed: https://chromium.googlesource.com/chromium/src/+/f84d6e755704745c233c23d7e652354ce7de227a

TBR=esprehn@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=694520
Review-Url: https://codereview.chromium.org/2755063002
Cr-Commit-Position: refs/heads/master@{#457691}
Committed: https://chromium.googlesource.com/chromium/src/+/0bc5ffca0d9756f49fba26e03fcdf8c3d58877c1

[meade_UTC10, 2017-03-17 03:24:16]

The CQ bit was checked by meade@chromium.org

[meade_UTC10, 2017-03-17 03:24:16]

Created Revert of Add a CHECK for null stuff in CompactPendingRules

[commit-bot: I haz the power, 2017-03-17 03:24:48]

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, 2017-03-17 05:11:54]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1489721056170400, "parent_rev":
"7822c80225dbb6c6fe2a887c842294a74fec2962", "commit_rev":
"0bc5ffca0d9756f49fba26e03fcdf8c3d58877c1"}

[commit-bot: I haz the power, 2017-03-17 05:12:59]

Description was changed from

==========
Revert of Add a CHECK for null stuff in CompactPendingRules (patchset #2
id:20001 of https://codereview.chromium.org/2740013002/ )

Reason for revert:
Reverting as I finish up my investigation.

Original issue's description:
> Add a CHECK for null stuff in CompactPendingRules
> 
> This should be impossible, but we'd like to try it in canary
> to try and figure out what's going on in the linked bug.
> 
> This should be reverted by 17 March.
> 
> BUG=694520
> 
> Review-Url: https://codereview.chromium.org/2740013002
> Cr-Commit-Position: refs/heads/master@{#455697}
> Committed:
https://chromium.googlesource.com/chromium/src/+/f84d6e755704745c233c23d7e652...

TBR=esprehn@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=694520
==========

to

==========
Revert of Add a CHECK for null stuff in CompactPendingRules (patchset #2
id:20001 of https://codereview.chromium.org/2740013002/ )

Reason for revert:
Reverting as I finish up my investigation.

Original issue's description:
> Add a CHECK for null stuff in CompactPendingRules
> 
> This should be impossible, but we'd like to try it in canary
> to try and figure out what's going on in the linked bug.
> 
> This should be reverted by 17 March.
> 
> BUG=694520
> 
> Review-Url: https://codereview.chromium.org/2740013002
> Cr-Commit-Position: refs/heads/master@{#455697}
> Committed:
https://chromium.googlesource.com/chromium/src/+/f84d6e755704745c233c23d7e652...

TBR=esprehn@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=694520

Review-Url: https://codereview.chromium.org/2755063002
Cr-Commit-Position: refs/heads/master@{#457691}
Committed:
https://chromium.googlesource.com/chromium/src/+/0bc5ffca0d9756f49fba26e03fcd...
==========

[commit-bot: I haz the power, 2017-03-17 05:13:00]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/0bc5ffca0d9756f49fba26e03fcd...