Revert of Convert Site Isolation Win bot to --isolate-extensions.

Revert of Convert Site Isolation Win bot to --isolate-extensions. (patchset #2 id:20001 of https://codereview.chromium.org/2459813003/ )

Reason for revert:
This CL is the most likely cause of linux_site_isolation purpleness (https://crbug.com/661447).

Original issue's description:
> Convert Site Isolation Win bot to --isolate-extensions.
>
> The --isolate-extension feature is not enabled by default for now, so
> convert the bot to ensure we have test coverage for it.
>
> BUG=545200
>
> Committed: https://crrev.com/500b39f98671c820f3a519b30e49e0d6e860dc64
> Cr-Commit-Position: refs/heads/master@{#428848}

TBR=alexmos@chromium.org,creis@chromium.org,nasko@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=545200
Committed: https://crrev.com/f1fd37d16b103525d36ec8b7aa261a51ce8f6f22
Cr-Commit-Position: refs/heads/master@{#429296}

[Łukasz Anforowicz, 2016-11-02 15:17:19]

The CQ bit was checked by lukasza@chromium.org

[Łukasz Anforowicz, 2016-11-02 15:17:20]

Created Revert of Convert Site Isolation Win bot to --isolate-extensions.

[commit-bot: I haz the power, 2016-11-02 15:17:40]

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, 2016-11-02 16:26:04]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-11-02 16:51:06]

Description was changed from

==========
Revert of Convert Site Isolation Win bot to --isolate-extensions. (patchset #2
id:20001 of https://codereview.chromium.org/2459813003/ )

Reason for revert:
This CL is the most likely cause of linux_site_isolation purpleness
(https://crbug.com/661447).

Original issue's description:
> Convert Site Isolation Win bot to --isolate-extensions.
> 
> The --isolate-extension feature is not enabled by default for now, so
> convert the bot to ensure we have test coverage for it.
> 
> BUG=545200
> 
> Committed: https://crrev.com/500b39f98671c820f3a519b30e49e0d6e860dc64
> Cr-Commit-Position: refs/heads/master@{#428848}

TBR=alexmos@chromium.org,creis@chromium.org,nasko@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=545200
==========

to

==========
Revert of Convert Site Isolation Win bot to --isolate-extensions. (patchset #2
id:20001 of https://codereview.chromium.org/2459813003/ )

Reason for revert:
This CL is the most likely cause of linux_site_isolation purpleness
(https://crbug.com/661447).

Original issue's description:
> Convert Site Isolation Win bot to --isolate-extensions.
>
> The --isolate-extension feature is not enabled by default for now, so
> convert the bot to ensure we have test coverage for it.
>
> BUG=545200
>
> Committed: https://crrev.com/500b39f98671c820f3a519b30e49e0d6e860dc64
> Cr-Commit-Position: refs/heads/master@{#428848}

TBR=alexmos@chromium.org,creis@chromium.org,nasko@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=545200

Committed: https://crrev.com/f1fd37d16b103525d36ec8b7aa261a51ce8f6f22
Cr-Commit-Position: refs/heads/master@{#429296}
==========

[commit-bot: I haz the power, 2016-11-02 16:51:07]

Patchset 1 (id:??) landed as
https://crrev.com/f1fd37d16b103525d36ec8b7aa261a51ce8f6f22
Cr-Commit-Position: refs/heads/master@{#429296}