Convert midi_unittests to run exclusively on Swarming

Convert midi_unittests to run exclusively on Swarming

13 configs already ran on Swarming
16 used to run locally and were converted:
- chromium.chromiumos.json: Linux ChromiumOS Ozone Tests (1)
- chromium.chromiumos.json: Linux ChromiumOS Tests (1)
- chromium.chromiumos.json: Linux ChromiumOS Tests (dbg)(1)
- 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
- chromium.memory.fyi.json: Linux TSan Tests
- chromium.memory.json: Linux ASan LSan Tests (1)
- chromium.memory.json: Linux Chromium OS ASan LSan Tests (1)
- chromium.memory.json: Mac ASan 64 Tests (1)
- chromium.webkit.json: Linux ChromiumOS Tests (1)
- chromium.webkit.json: Linux ChromiumOS Tests (dbg)(1)

Ran:
  ./manage.py --convert midi_unittests

R=dpranke@chromium.org
BUG=98637
Committed: https://crrev.com/fd955c285b8196938bd08767de2df019c7029a07
Cr-Commit-Position: refs/heads/master@{#336264}

[Dirk Pranke, 2015-06-25 20:14:22]

lgtm

[M-A Ruel, 2015-06-25 20:25:56]

The CQ bit was checked by maruel@chromium.org

[commit-bot: I haz the power, 2015-06-25 20:26:24]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1208103004/1

[commit-bot: I haz the power, 2015-06-25 21:40:37]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-06-25 21:41:56]

Patchset 1 (id:??) landed as
https://crrev.com/fd955c285b8196938bd08767de2df019c7029a07
Cr-Commit-Position: refs/heads/master@{#336264}

[Mike Wittman, 2015-06-25 22:31:07]

A revert of this CL (patchset #1 id:1) has been created in
https://codereview.chromium.org/1210933003/ by wittman@chromium.org.

The reason for reverting is: Suspecting this or
https://codereview.chromium.org/1206413002 broke isolate step on Mac ASan 64.
Reverting both CLs.

https://build.chromium.org/p/chromium.memory/builders/Mac%20ASan%2064%20Build....