Update comments for AuthorizationExecuteWithPrivileges.

Update comments for AuthorizationExecuteWithPrivileges.

As per discussion on crbug, no good replacement exists. Update the comments to
indicate this.

BUG=593133
Committed: https://crrev.com/1a2f872a1bcaa864308372fd94c502c309fdfc53
Cr-Commit-Position: refs/heads/master@{#423176}

[erikchen, 2016-10-05 00:10:08]

The CQ bit was checked by erikchen@chromium.org to run a CQ dry run

[erikchen, 2016-10-05 00:10:13]

erikchen@chromium.org changed reviewers:
+ mark@chromium.org

[commit-bot: I haz the power, 2016-10-05 00:10:26]

Dry run: CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-10-05 00:39:26]

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

[commit-bot: I haz the power, 2016-10-05 00:39:27]

Dry run: This issue passed the CQ dry run.

[Mark Mentovai, 2016-10-05 15:25:01]

LGTM

[erikchen, 2016-10-05 16:06:28]

The CQ bit was checked by erikchen@chromium.org

[commit-bot: I haz the power, 2016-10-05 16:06:51]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-10-05 16:13:15]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-10-05 16:16:43]

Description was changed from

==========
Update comments for AuthorizationExecuteWithPrivileges.

As per discussion on crbug, no good replacement exists. Update the comments to
indicate this.

BUG=593133
==========

to

==========
Update comments for AuthorizationExecuteWithPrivileges.

As per discussion on crbug, no good replacement exists. Update the comments to
indicate this.

BUG=593133

Committed: https://crrev.com/1a2f872a1bcaa864308372fd94c502c309fdfc53
Cr-Commit-Position: refs/heads/master@{#423176}
==========

[commit-bot: I haz the power, 2016-10-05 16:16:44]

Patchset 1 (id:??) landed as
https://crrev.com/1a2f872a1bcaa864308372fd94c502c309fdfc53
Cr-Commit-Position: refs/heads/master@{#423176}