Revert of Relax assert a little to fix flake on regress-3976

Revert of Relax assert a little to fix flake on regress-3976 (patchset #1 id:1 of https://codereview.chromium.org/1045763002/)

Reason for revert:
Reverting due to JSOn parser failures

Original issue's description:
> Relax assert a little to fix flake on regress-3976
>
> R=verwaest@chromium.org
> NOTRY=true
> BUG=
>
> Committed: https://crrev.com/b20edd7772892ff8b2b280b35e521fbc2cc4a5f6
> Cr-Commit-Position: refs/heads/master@{#27515}

TBR=verwaest@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=

Committed: https://crrev.com/1912814f011845ff9fe1a4c4ad4857b9b7d6eda5
Cr-Commit-Position: refs/heads/master@{#27561}

[Erik Corry Chromium.org, 2015-04-01 09:20:30]

Created Revert of Relax assert a little to fix flake on regress-3976

[commit-bot: I haz the power, 2015-04-01 09:20:43]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1050033003/1

[commit-bot: I haz the power, 2015-04-01 09:21:00]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-04-01 09:21:10]

Patchset 1 (id:??) landed as
https://crrev.com/1912814f011845ff9fe1a4c4ad4857b9b7d6eda5
Cr-Commit-Position: refs/heads/master@{#27561}