Fixing check_orphan_headers on Windows

Fixing check_orphan_headers on Windows

There were too many assumptions of the fact that the check was running
on Linux.

BUG=webrtc:7635
NOTRY=True

Review-Url: https://codereview.webrtc.org/2878733004
Cr-Commit-Position: refs/heads/master@{#18120}
Committed: https://chromium.googlesource.com/external/webrtc/+/26c26345c3faf0b2ea5f09583ceeba133a2687e2

[mbonadei, 2017-05-12 07:59:05]

mbonadei@webrtc.org changed reviewers:
+ kjellander@webrtc.org

[kjellander_webrtc, 2017-05-12 08:58:48]

lgtm

[mbonadei, 2017-05-12 09:03:18]

The CQ bit was checked by mbonadei@webrtc.org

[commit-bot: I haz the power, 2017-05-12 09:03:25]

CQ is trying da patch.

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

[commit-bot: I haz the power, 2017-05-12 09:06:17]

CQ is committing da patch.

Bot data: {"patchset_id": 20001, "attempt_start_ts": 1494579798865140,
"parent_rev": "cdcc6b3fe6c7431a4579341da4f27f851d24b59d", "commit_rev":
"26c26345c3faf0b2ea5f09583ceeba133a2687e2"}

[commit-bot: I haz the power, 2017-05-12 09:06:20]

Description was changed from

==========
Fixing check_orphan_headers on Windows

There were too many assumptions of the fact that the check was running
on Linux.

BUG=webrtc:7635
NOTRY=True
==========

to

==========
Fixing check_orphan_headers on Windows

There were too many assumptions of the fact that the check was running
on Linux.

BUG=webrtc:7635
NOTRY=True

Review-Url: https://codereview.webrtc.org/2878733004
Cr-Commit-Position: refs/heads/master@{#18120}
Committed:
https://chromium.googlesource.com/external/webrtc/+/26c26345c3faf0b2ea5f09583...
==========

[commit-bot: I haz the power, 2017-05-12 09:06:21]

Committed patchset #2 (id:20001) as
https://chromium.googlesource.com/external/webrtc/+/26c26345c3faf0b2ea5f09583...