Convert mojo_public_bindings_unittests to run exclusively on Swarming

Convert mojo_public_bindings_unittests to run exclusively on Swarming

0 configs already ran on Swarming
20 used to run locally and were converted:
- chromium.fyi.json: ClangToTLinux tester
- chromium.fyi.json: ClangToTMac tester
- chromium.fyi.json: ClangToTMacASan tester
- chromium.fyi.json: Linux Trusty
- chromium.fyi.json: Linux Trusty (dbg)
- chromium.linux.json: Android GN
- chromium.linux.json: Linux Tests
- chromium.linux.json: Linux Tests (dbg)(1)
- chromium.linux.json: Linux Tests (dbg)(1)(32)
- chromium.mac.json: Mac10.10 Tests
- chromium.mac.json: Mac10.6 Tests
- chromium.mac.json: Mac10.8 Tests
- chromium.mac.json: Mac10.9 Tests
- chromium.mac.json: Mac10.9 Tests (dbg)
- chromium.memory.fyi.json: Linux ChromeOS MSan Tests
- chromium.memory.fyi.json: Linux MSan Tests
- chromium.win.json: Vista Tests (1)
- chromium.win.json: Win 7 Tests x64 (1)
- chromium.win.json: Win7 Tests (1)
- chromium.win.json: Win7 Tests (dbg)(1)

Ran:
  ./manage.py --convert mojo_public_bindings_unittests

R=
BUG=98637
Committed: https://crrev.com/cab8d2376ed52e913574cb6245c327c5c2cf2fd7
Cr-Commit-Position: refs/heads/master@{#339015}

[M-A Ruel, 2015-07-16 00:27:24]

maruel@chromium.org changed reviewers:
+ jam@chromium.org

[jam, 2015-07-16 03:22:46]

lgtm

[M-A Ruel, 2015-07-16 11:32:10]

The CQ bit was checked by maruel@chromium.org

[commit-bot: I haz the power, 2015-07-16 11:32:14]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1231283003/1

[commit-bot: I haz the power, 2015-07-16 12:02:44]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-07-16 12:03:53]

Patchset 1 (id:??) landed as
https://crrev.com/cab8d2376ed52e913574cb6245c327c5c2cf2fd7
Cr-Commit-Position: refs/heads/master@{#339015}

[Nico, 2015-07-16 17:08:25]

thakis@chromium.org changed reviewers:
+ thakis@chromium.org

[Nico, 2015-07-16 17:08:25]

you forgot to update build/gn_migration.gypi