Revert of Add debug information for crbug.com/289715

Revert of Add debug information for crbug.com/289715 (patchset #5 id:80001 of https://codereview.chromium.org/810883007/)

Reason for revert:
Remove debugging information that was collected for crbug.com/289715

Original issue's description:
> Add debug information for crbug.com/289715
>
> Add temporary debugging information to determine whether a callback happens
> after the targeted URLRequestHttpJob was already deleted or whether a callback
> happens after its transaction was deleted.
>
> BUG=289715
>
> Committed: https://crrev.com/aec005dce78bc2c2513f4e49343b8baad751a852
> Cr-Commit-Position: refs/heads/master@{#310822}

TBR=mmenke@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=289715
Committed: https://crrev.com/652b6d56d7a585e52ee8c7a8b5aea06b804bf02b
Cr-Commit-Position: refs/heads/master@{#315298}

[battre, 2015-02-09 15:03:49]

Created Revert of Add debug information for crbug.com/289715

[commit-bot: I haz the power, 2015-02-09 15:04:22]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/907033002/1

[commit-bot: I haz the power, 2015-02-09 15:05:07]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-02-09 15:05:46]

Patchset 1 (id:??) landed as
https://crrev.com/652b6d56d7a585e52ee8c7a8b5aea06b804bf02b
Cr-Commit-Position: refs/heads/master@{#315298}