Revert of Add logging to profile downloader to diagnose Android FR issue.

Revert of Add logging to profile downloader to diagnose Android FR issue. (patchset #1 id:1 of https://codereview.chromium.org/1326273003/ )

Reason for revert:
Reverting because of reproducible crash, cf. https://crbug.com/530453.

Original issue's description:
> Add logging to profile downloader to diagnose Android FR issue.
>
> This is a very temporary fix that will be reverted in a few days when the additional information has been used to pinpoint the bug.
>
> BUG=500854, 530453
>
> Committed: https://crrev.com/55e6026b5e2016626cf3abf126e55e421e0aa2b2
> Cr-Commit-Position: refs/heads/master@{#347932}

TBR=rogerta@chromium.org,anthonyvd@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=500854, 530453
Committed: https://crrev.com/daad921a8497b37f14d8e2eba438245f08683ef9
Cr-Commit-Position: refs/heads/master@{#348591}

[Thiemo Nagel, 2015-09-14 09:02:23]

Created Revert of Add logging to profile downloader to diagnose Android FR
issue.

[commit-bot: I haz the power, 2015-09-14 09:02:27]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1339783003/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1339783003/1

[commit-bot: I haz the power, 2015-09-14 09:02:50]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-09-14 09:03:25]

Patchset 1 (id:??) landed as
https://crrev.com/daad921a8497b37f14d8e2eba438245f08683ef9
Cr-Commit-Position: refs/heads/master@{#348591}

[commit-bot: I haz the power, 2015-09-23 12:31:09]

Patchset 1 (id:??) landed as
https://crrev.com/daad921a8497b37f14d8e2eba438245f08683ef9
Cr-Commit-Position: refs/heads/master@{#348591}