[ABANDONED] Revert of Update merge_pgc_files.py in preparation for VS2017

Revert of Update merge_pgc_files.py in preparation for VS2017 (patchset #7 id:120001 of https://codereview.chromium.org/2884613003/ )

Reason for revert:
I think that it's causing crbug.com/724921 , I'll investigate but this should probably be reverted in the meantime.

BUG=724921
Original issue's description:
> Update merge_pgc_files.py in preparation for VS2017
> 
> pgomgr.exe has been moved to a different location in VS2017 so the logic
> that find it should be updated.
> 
> It can't just be copied to the build directory because we always run the
> x64 bit version of this binary (and we don't want to mix x86 and x64
> binaries in the same build dir)
> 
> BUG=719319
> 
> Review-Url: https://codereview.chromium.org/2884613003
> Cr-Commit-Position: refs/heads/master@{#473438}
> Committed: https://chromium.googlesource.com/chromium/src/+/ab3a1821bb57a51d11be2b038b3a698236ccd5fc

TBR=brucedawson@chromium.org,scottmg@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=719319

[Sébastien Marchand, 2017-05-22 15:06:42]

The CQ bit was checked by sebmarchand@chromium.org

[Sébastien Marchand, 2017-05-22 15:06:43]

Created Revert of Update merge_pgc_files.py in preparation for VS2017

[commit-bot: I haz the power, 2017-05-22 15:07:01]

CQ is trying da patch.

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

[Sébastien Marchand, 2017-05-22 15:07:04]

The CQ bit was unchecked by sebmarchand@chromium.org

[Sébastien Marchand, 2017-05-22 15:10:11]

Aborting this revert, crbug.com/724921 has first been observed in 60.0.3105.0
but this has landed in 60.0.3107.0 (2 builds later).

[Sébastien Marchand, 2017-05-22 15:10:18]

Description was changed from

==========
Revert of Update merge_pgc_files.py in preparation for VS2017 (patchset #7
id:120001 of https://codereview.chromium.org/2884613003/ )

Reason for revert:
I think that it's causing crbug.com/724921 , I'll investigate but this should
probably be reverted in the meantime.

BUG=724921

Original issue's description:
> Update merge_pgc_files.py in preparation for VS2017
> 
> pgomgr.exe has been moved to a different location in VS2017 so the logic
> that find it should be updated.
> 
> It can't just be copied to the build directory because we always run the
> x64 bit version of this binary (and we don't want to mix x86 and x64
> binaries in the same build dir)
> 
> BUG=719319
> 
> Review-Url: https://codereview.chromium.org/2884613003
> Cr-Commit-Position: refs/heads/master@{#473438}
> Committed:
https://chromium.googlesource.com/chromium/src/+/ab3a1821bb57a51d11be2b038b3a...

TBR=brucedawson@chromium.org,scottmg@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=719319
==========

to

==========
Revert of Update merge_pgc_files.py in preparation for VS2017 (patchset #7
id:120001 of https://codereview.chromium.org/2884613003/ )

Reason for revert:
I think that it's causing crbug.com/724921 , I'll investigate but this should
probably be reverted in the meantime.

BUG=724921

Original issue's description:
> Update merge_pgc_files.py in preparation for VS2017
> 
> pgomgr.exe has been moved to a different location in VS2017 so the logic
> that find it should be updated.
> 
> It can't just be copied to the build directory because we always run the
> x64 bit version of this binary (and we don't want to mix x86 and x64
> binaries in the same build dir)
> 
> BUG=719319
> 
> Review-Url: https://codereview.chromium.org/2884613003
> Cr-Commit-Position: refs/heads/master@{#473438}
> Committed:
https://chromium.googlesource.com/chromium/src/+/ab3a1821bb57a51d11be2b038b3a...

TBR=brucedawson@chromium.org,scottmg@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=719319
==========