Clean up investigation code in DeleteHelper::DoDelete

Clean up investigation code in DeleteHelper::DoDelete

Removing a local variable to keep it in the crash dump, that is added in:
http://crrev.com/c7f0b95fefa64b7bb0accea8aafc3fb819bfdcc7

BUG=393634
Committed: https://crrev.com/34df520da32e17c95ccd4b17cb75cb8455b3d193
Cr-Commit-Position: refs/heads/master@{#294143}

[tzik, 2014-09-10 01:03:44]

tzik@chromium.org changed reviewers:
+ thakis@chromium.org

[tzik, 2014-09-10 01:04:22]

PTL.

[Nico, 2014-09-10 03:37:16]

lgtm

[tzik, 2014-09-10 03:57:35]

The CQ bit was checked by tzik@chromium.org

[commit-bot: I haz the power, 2014-09-10 03:58:40]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/tzik@chromium.org/562493004/1

[commit-bot: I haz the power, 2014-09-10 06:51:31]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2014-09-10 06:51:32]

Try jobs failed on following builders:
  win_chromium_rel_swarming on tryserver.chromium.win
(http://build.chromium.org/p/tryserver.chromium.win/builders/win_chromium_rel_...)

[tzik, 2014-09-10 07:09:04]

The CQ bit was checked by tzik@chromium.org

[commit-bot: I haz the power, 2014-09-10 07:09:16]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/tzik@chromium.org/562493004/1

[commit-bot: I haz the power, 2014-09-10 08:17:45]

Committed patchset #1 (id:1) as 3151f26a7b0e60d218e6f1ffe71ff687ae630e76

[commit-bot: I haz the power, 2014-09-10 10:56:04]

Patchset 1 (id:??) landed as
https://crrev.com/34df520da32e17c95ccd4b17cb75cb8455b3d193
Cr-Commit-Position: refs/heads/master@{#294143}