Revert of Add checks to understand crash in NavigationHandle::DidCommitNavigation

Revert of Add checks to understand crash in NavigationHandle::DidCommitNavigation (patchset #3 id:40001 of https://codereview.chromium.org/1735123002/ )

Reason for revert:
This has been in Canary for 5 days and was not triggered, so reverting this temporary CHECK.

Original issue's description:
> Add checks to understand crash in NavigationHandle::DidCommitNavigation
>
> This CL adds checks to try to understand why a CHECK is being hit in the wild
> in NavigationHandle::DidCommitNavigation.
>
> BUG=589365
> CQ_INCLUDE_TRYBOTS=tryserver.chromium.linux:linux_site_isolation
>
> Committed: https://crrev.com/f20af5b3d9add0310725392646e33d0ed11e1e4f
> Cr-Commit-Position: refs/heads/master@{#377881}

TBR=nasko@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=589365
Committed: https://crrev.com/cb0861d834ce620c026ac2759c3728a93ead0eaf
Cr-Commit-Position: refs/heads/master@{#378750}

[clamy, 2016-03-02 14:28:13]

Created Revert of Add checks to understand crash in
NavigationHandle::DidCommitNavigation

[commit-bot: I haz the power, 2016-03-02 14:28:30]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1756143002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1756143002/1

[commit-bot: I haz the power, 2016-03-02 14:31:28]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1756143002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1756143002/1

[commit-bot: I haz the power, 2016-03-02 15:01:28]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1756143002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1756143002/1

[commit-bot: I haz the power, 2016-03-02 15:31:28]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1756143002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1756143002/1

[commit-bot: I haz the power, 2016-03-02 15:45:32]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-03-02 15:46:26]

Description was changed from

==========
Revert of Add checks to understand crash in
NavigationHandle::DidCommitNavigation (patchset #3 id:40001 of
https://codereview.chromium.org/1735123002/ )

Reason for revert:
This has been in Canary for 5 days and was not triggered, so reverting this
temporary CHECK.

Original issue's description:
> Add checks to understand crash in NavigationHandle::DidCommitNavigation
> 
> This CL adds checks to try to understand why a CHECK is being hit in the wild
> in NavigationHandle::DidCommitNavigation.
> 
> BUG=589365
> CQ_INCLUDE_TRYBOTS=tryserver.chromium.linux:linux_site_isolation
> 
> Committed: https://crrev.com/f20af5b3d9add0310725392646e33d0ed11e1e4f
> Cr-Commit-Position: refs/heads/master@{#377881}

TBR=nasko@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=589365
==========

to

==========
Revert of Add checks to understand crash in
NavigationHandle::DidCommitNavigation (patchset #3 id:40001 of
https://codereview.chromium.org/1735123002/ )

Reason for revert:
This has been in Canary for 5 days and was not triggered, so reverting this
temporary CHECK.

Original issue's description:
> Add checks to understand crash in NavigationHandle::DidCommitNavigation
>
> This CL adds checks to try to understand why a CHECK is being hit in the wild
> in NavigationHandle::DidCommitNavigation.
>
> BUG=589365
> CQ_INCLUDE_TRYBOTS=tryserver.chromium.linux:linux_site_isolation
>
> Committed: https://crrev.com/f20af5b3d9add0310725392646e33d0ed11e1e4f
> Cr-Commit-Position: refs/heads/master@{#377881}

TBR=nasko@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=589365

Committed: https://crrev.com/cb0861d834ce620c026ac2759c3728a93ead0eaf
Cr-Commit-Position: refs/heads/master@{#378750}
==========

[commit-bot: I haz the power, 2016-03-02 15:46:28]

Patchset 1 (id:??) landed as
https://crrev.com/cb0861d834ce620c026ac2759c3728a93ead0eaf
Cr-Commit-Position: refs/heads/master@{#378750}