Revert of Make chrome/BUILD.gn use symlink.gni rather than symlink.py directly

Revert of Make chrome/BUILD.gn use symlink.gni rather than symlink.py directly (patchset #1 id:1 of https://codereview.chromium.org/2349603002/ )

Reason for revert:
Breaks BuildPackages due to GN error (https://bugs.chromium.org/p/chromium/issues/detail?id=647706).

BUG=647706
Original issue's description:
> Make chrome/BUILD.gn use symlink.gni rather than symlink.py directly
>
> Committed: https://crrev.com/ca5b9cba81bf335ce205cc06e094587b25c79758
> Cr-Commit-Position: refs/heads/master@{#419168}

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

Committed: https://crrev.com/a07b9abadda659da084e94fc2a6a2d45da52a7a5
Cr-Commit-Position: refs/heads/master@{#419190}

[afakhry, 2016-09-16 16:47:39]

The CQ bit was checked by afakhry@chromium.org

[afakhry, 2016-09-16 16:47:39]

Created Revert of Make chrome/BUILD.gn use symlink.gni rather than symlink.py
directly

[commit-bot: I haz the power, 2016-09-16 16:48:10]

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, 2016-09-16 16:49:16]

Description was changed from

==========
Revert of Make chrome/BUILD.gn use symlink.gni rather than symlink.py directly
(patchset #1 id:1 of https://codereview.chromium.org/2349603002/ )

Reason for revert:
Breaks BuildPackages due to GN error
(https://bugs.chromium.org/p/chromium/issues/detail?id=647706).

BUG=647706

Original issue's description:
> Make chrome/BUILD.gn use symlink.gni rather than symlink.py directly
> 
> Committed: https://crrev.com/ca5b9cba81bf335ce205cc06e094587b25c79758
> Cr-Commit-Position: refs/heads/master@{#419168}

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

to

==========
Revert of Make chrome/BUILD.gn use symlink.gni rather than symlink.py directly
(patchset #1 id:1 of https://codereview.chromium.org/2349603002/ )

Reason for revert:
Breaks BuildPackages due to GN error
(https://bugs.chromium.org/p/chromium/issues/detail?id=647706).

BUG=647706

Original issue's description:
> Make chrome/BUILD.gn use symlink.gni rather than symlink.py directly
> 
> Committed: https://crrev.com/ca5b9cba81bf335ce205cc06e094587b25c79758
> Cr-Commit-Position: refs/heads/master@{#419168}

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

[commit-bot: I haz the power, 2016-09-16 16:49:17]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-09-16 16:51:05]

Description was changed from

==========
Revert of Make chrome/BUILD.gn use symlink.gni rather than symlink.py directly
(patchset #1 id:1 of https://codereview.chromium.org/2349603002/ )

Reason for revert:
Breaks BuildPackages due to GN error
(https://bugs.chromium.org/p/chromium/issues/detail?id=647706).

BUG=647706

Original issue's description:
> Make chrome/BUILD.gn use symlink.gni rather than symlink.py directly
> 
> Committed: https://crrev.com/ca5b9cba81bf335ce205cc06e094587b25c79758
> Cr-Commit-Position: refs/heads/master@{#419168}

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

to

==========
Revert of Make chrome/BUILD.gn use symlink.gni rather than symlink.py directly
(patchset #1 id:1 of https://codereview.chromium.org/2349603002/ )

Reason for revert:
Breaks BuildPackages due to GN error
(https://bugs.chromium.org/p/chromium/issues/detail?id=647706).

BUG=647706

Original issue's description:
> Make chrome/BUILD.gn use symlink.gni rather than symlink.py directly
>
> Committed: https://crrev.com/ca5b9cba81bf335ce205cc06e094587b25c79758
> Cr-Commit-Position: refs/heads/master@{#419168}

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

Committed: https://crrev.com/a07b9abadda659da084e94fc2a6a2d45da52a7a5
Cr-Commit-Position: refs/heads/master@{#419190}
==========

[commit-bot: I haz the power, 2016-09-16 16:51:06]

Patchset 1 (id:??) landed as
https://crrev.com/a07b9abadda659da084e94fc2a6a2d45da52a7a5
Cr-Commit-Position: refs/heads/master@{#419190}

[Dirk Pranke, 2016-09-16 16:55:38]

lgtm