Convert content_unittests to run exclusively on Swarming

Convert content_unittests to run exclusively on Swarming

20 configs used to already run on Swarming
10 used to run locally and were converted:
- chromium.chromiumos.json: Linux ChromiumOS Ozone Tests (1)
- chromium.fyi.json: Browser Side Navigation Linux
- 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.webkit.json: Linux ChromiumOS Tests (1)

Ran:
  ./manage.py --convert content_unittests

R=dpranke@chromium.org
BUG=98637
Committed: https://crrev.com/97855d3957791e9ebe60092ae869c2722899bfeb
Cr-Commit-Position: refs/heads/master@{#335757}

[M-A Ruel, 2015-06-23 18:59:10]

Almost done with tests starting with the letter C :)

[Dirk Pranke, 2015-06-23 19:26:48]

lgtm

[M-A Ruel, 2015-06-23 19:27:45]

The CQ bit was checked by maruel@chromium.org

[commit-bot: I haz the power, 2015-06-23 19:30:04]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1200263002/1

[commit-bot: I haz the power, 2015-06-23 20:33:46]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2015-06-23 20:33:47]

Try jobs failed on following builders:
  linux_chromium_asan_rel_ng on tryserver.chromium.linux (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.linux/builders/linux_chromium_...)

[M-A Ruel, 2015-06-23 20:44:21]

The CQ bit was checked by maruel@chromium.org

[commit-bot: I haz the power, 2015-06-23 20:44:56]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1200263002/1

[commit-bot: I haz the power, 2015-06-23 21:40:09]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-06-23 21:41:00]

Patchset 1 (id:??) landed as
https://crrev.com/97855d3957791e9ebe60092ae869c2722899bfeb
Cr-Commit-Position: refs/heads/master@{#335757}