Convert unit_tests to run exclusively on Swarming

Convert unit_tests to run exclusively on Swarming

21 configs already ran on Swarming
6 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.memory.fyi.json: Linux ChromeOS MSan Tests
- chromium.memory.fyi.json: Linux MSan Tests

Ran:
  ./manage.py --convert unit_tests

R=dpranke@chromium.org
BUG=98637
Committed: https://crrev.com/43a47c3c3a75ea15847677e5f8950bfd12143b45
Cr-Commit-Position: refs/heads/master@{#336259}

[M-A Ruel, 2015-06-25 19:04:32]

This is the last one. After that I'll start looking at the other tests.

[Dirk Pranke, 2015-06-25 20:17:10]

lgtm

[M-A Ruel, 2015-06-25 20:26:15]

The CQ bit was checked by maruel@chromium.org

[commit-bot: I haz the power, 2015-06-25 20:28:21]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1213513004/1

[commit-bot: I haz the power, 2015-06-25 21:36:44]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-06-25 21:39:03]

Patchset 1 (id:??) landed as
https://crrev.com/43a47c3c3a75ea15847677e5f8950bfd12143b45
Cr-Commit-Position: refs/heads/master@{#336259}