Revert of Fix sbox_validation_tests & Make isolate_driver.py include the executable itself

Revert of Fix sbox_validation_tests & Make isolate_driver.py include the executable itself (patchset #3 id:90001 of https://codereview.chromium.org/1245873002/ )

Reason for revert:
This CL seems to break compile http://build.chromium.org/p/chromium.chrome/builders/Google%20Chrome%20Linux%20x64/builds/3900/.

If the revert doesn't fix it, I will re-land this CL.

Original issue's description:
> Fix sbox_validation_tests & Make isolate_driver.py include the executable itself
>
> Further reduce the boilerplate in .isolate files and is necessary to add debug
> symbols, to be done in a follow up.
>
> Slightly accelerate ninja file parsing by blacklisting more extensions.
>
> sbox_validation_tests wasn't run on Windows since
> https://codereview.chromium.org/1212003003/ (~2 months ago). Thankfully this CL
> uncovered this copy-paste error.
>
> TBR=jam@chromium.org
> BUG=98637
> CQ_INCLUDE_TRYBOTS=tryserver.blink:linux_blink_rel
>
> Committed: https://crrev.com/c6649f2e014a24a9093140a06fcadcaf2a06513c
> Cr-Commit-Position: refs/heads/master@{#347027}

TBR=jam@chromium.org,maruel@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=98637
Committed: https://crrev.com/7c8964f3cf1551e847ffd178a9e8731deec70437
Cr-Commit-Position: refs/heads/master@{#347071}

[stgao, 2015-09-03 00:11:45]

Created Revert of Fix sbox_validation_tests & Make isolate_driver.py include the
executable itself

[stgao, 2015-09-03 00:15:15]

The CQ bit was unchecked by stgao@chromium.org

[stgao, 2015-09-03 00:15:24]

The CQ bit was checked by stgao@chromium.org

[commit-bot: I haz the power, 2015-09-03 00:32:02]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1329783003/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1329783003/1

[commit-bot: I haz the power, 2015-09-03 00:37:28]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-09-03 00:37:59]

Patchset 1 (id:??) landed as
https://crrev.com/7c8964f3cf1551e847ffd178a9e8731deec70437
Cr-Commit-Position: refs/heads/master@{#347071}