Convert net_unittests to run exclusively on Swarming

Convert net_unittests to run exclusively on Swarming

22 configs already ran on Swarming
7 used to run locally and were converted:
- chromium.fyi.json: CrWinAsan tester
- chromium.fyi.json: CrWinAsan(dll) tester
- chromium.fyi.json: Linux Trusty
- chromium.fyi.json: Linux Trusty (dbg)
- chromium.linux.json: Cast Linux
- chromium.memory.fyi.json: Linux ChromeOS MSan Tests
- chromium.memory.fyi.json: Linux MSan Tests

Ran:
  ./manage.py --convert net_unittests

R=dpranke@chromium.org
BUG=98637
Committed: https://crrev.com/d1ecfdcf13c283d6f4faca162b8b40353a46db37
Cr-Commit-Position: refs/heads/master@{#336151}

[Dirk Pranke, 2015-06-24 00:46:11]

lgtm

[M-A Ruel, 2015-06-25 13:27:24]

The CQ bit was checked by maruel@chromium.org

[commit-bot: I haz the power, 2015-06-25 13:28:13]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1207533002/1

[commit-bot: I haz the power, 2015-06-25 14:40:06]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-06-25 14:40:55]

Patchset 1 (id:??) landed as
https://crrev.com/d1ecfdcf13c283d6f4faca162b8b40353a46db37
Cr-Commit-Position: refs/heads/master@{#336151}