Revert of Don't IAT patch SetUnhandledExceptionFilter when ASan is active

Revert of Don't IAT patch SetUnhandledExceptionFilter when ASan is active (patchset #1 id:1 of https://codereview.chromium.org/2220583002/ )

Reason for revert:
This causes crashpad to emit "haven't called UseHandler()" errors later.

Original issue's description:
> Don't IAT patch SetUnhandledExceptionFilter when ASan is active
>
> ASan installs its own exception filter that ClusterFuzz needs to see.
>
> R=robertshield@chromium.org,inferno@chromium.org
> BUG=626373
>
> Committed: https://crrev.com/3894e46c8c2702e12d2ddec12f186d7c1cf5c412
> Cr-Commit-Position: refs/heads/master@{#410077}

TBR=inferno@chromium.org,robertshield@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=626373
Committed: https://crrev.com/07928da2532a9a7d1149d0878d0931dd209f0d3c
Cr-Commit-Position: refs/heads/master@{#410106}

[Reid Kleckner, 2016-08-05 18:00:06]

The CQ bit was checked by rnk@chromium.org

[Reid Kleckner, 2016-08-05 18:00:07]

Created Revert of Don't IAT patch SetUnhandledExceptionFilter when ASan is
active

[commit-bot: I haz the power, 2016-08-05 18:00:27]

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, 2016-08-05 18:01:14]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-08-05 18:03:33]

Description was changed from

==========
Revert of Don't IAT patch SetUnhandledExceptionFilter when ASan is active
(patchset #1 id:1 of https://codereview.chromium.org/2220583002/ )

Reason for revert:
This causes crashpad to emit "haven't called UseHandler()" errors later.

Original issue's description:
> Don't IAT patch SetUnhandledExceptionFilter when ASan is active
> 
> ASan installs its own exception filter that ClusterFuzz needs to see.
> 
> R=robertshield@chromium.org,inferno@chromium.org
> BUG=626373
> 
> Committed: https://crrev.com/3894e46c8c2702e12d2ddec12f186d7c1cf5c412
> Cr-Commit-Position: refs/heads/master@{#410077}

TBR=inferno@chromium.org,robertshield@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=626373
==========

to

==========
Revert of Don't IAT patch SetUnhandledExceptionFilter when ASan is active
(patchset #1 id:1 of https://codereview.chromium.org/2220583002/ )

Reason for revert:
This causes crashpad to emit "haven't called UseHandler()" errors later.

Original issue's description:
> Don't IAT patch SetUnhandledExceptionFilter when ASan is active
>
> ASan installs its own exception filter that ClusterFuzz needs to see.
>
> R=robertshield@chromium.org,inferno@chromium.org
> BUG=626373
>
> Committed: https://crrev.com/3894e46c8c2702e12d2ddec12f186d7c1cf5c412
> Cr-Commit-Position: refs/heads/master@{#410077}

TBR=inferno@chromium.org,robertshield@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=626373

Committed: https://crrev.com/07928da2532a9a7d1149d0878d0931dd209f0d3c
Cr-Commit-Position: refs/heads/master@{#410106}
==========

[commit-bot: I haz the power, 2016-08-05 18:03:34]

Patchset 1 (id:??) landed as
https://crrev.com/07928da2532a9a7d1149d0878d0931dd209f0d3c
Cr-Commit-Position: refs/heads/master@{#410106}

[aarya, 2016-08-05 18:05:07]

aarya@google.com changed reviewers:
+ aarya@google.com, rsesek@chromium.org, scottmg@chromium.org

[inferno, 2016-08-06 00:45:40]

A revert of this CL (patchset #1 id:1) has been created in
https://codereview.chromium.org/2217833004/ by inferno@chromium.org.

The reason for reverting is: This patch didn't impact Crashpad..