Update path to test_env.py for Windows and Mac tests.

Fix path to test_env.py for Windows and Mac tests.

The python wrapper CL just landed. I'd like to see it work as expected for some iterations on Linux, before starting to use it on Windows as well. So for now, just fixing the path to the file used on Windows.

BUG=

Committed: https://crrev.com/7387ae22eec767711590ba2cf59eba34bc5f66bb
Cr-Commit-Position: refs/heads/master@{#300198}

[anandc, 2014-10-17 21:11:44]

anandc@chromium.org changed reviewers:
+ weitaosu@chromium.org

[anandc, 2014-10-17 21:12:41]

Weitao, could you please take a quick look? 

This should fix the error being seen on the Chromoting Windows test bot:
http://chromegw.corp.google.com/i/internal.chromoting/builders/Windows%20Test...

[weitao, 2014-10-17 23:39:16]

LGTM

[anandc, 2014-10-18 00:08:03]

The CQ bit was checked by anandc@chromium.org

[commit-bot: I haz the power, 2014-10-18 00:08:45]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/661193003/1

[commit-bot: I haz the power, 2014-10-18 01:45:51]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2014-10-18 01:46:26]

Patchset 1 (id:??) landed as
https://crrev.com/7387ae22eec767711590ba2cf59eba34bc5f66bb
Cr-Commit-Position: refs/heads/master@{#300198}