Actual fix for braille translation initialization race.

Actual fix for braille translation initialization race.

This revers https://codereview.chromium.org/905353002 and instead
waits with initializing liblouis until the DOMContentLoaded event
fires.  This makes loading the nacl module reliable and also gets rid of the
retry loop that was used before.

TESTED=manual
BUG=none
R=dtseng@chromium.org

Committed: https://crrev.com/96b1042a3e4b5220e02369f3f5598915a07bc999
Cr-Commit-Position: refs/heads/master@{#316195}

[David Tseng, 2015-02-11 17:02:46]

lgtm

[Peter Lundblad, 2015-02-12 12:52:58]

The CQ bit was checked by plundblad@chromium.org

[commit-bot: I haz the power, 2015-02-12 12:53:57]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/917793003/1

[commit-bot: I haz the power, 2015-02-12 13:49:04]

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

[commit-bot: I haz the power, 2015-02-12 13:49:05]

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

[Peter Lundblad, 2015-02-12 15:45:22]

New patchsets have been uploaded after l-g-t-m from dtseng@chromium.org

[Peter Lundblad, 2015-02-13 08:51:49]

The CQ bit was checked by plundblad@chromium.org

[commit-bot: I haz the power, 2015-02-13 08:52:03]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/917793003/20001

[commit-bot: I haz the power, 2015-02-13 09:19:35]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2015-02-13 09:20:12]

Patchset 2 (id:??) landed as
https://crrev.com/96b1042a3e4b5220e02369f3f5598915a07bc999
Cr-Commit-Position: refs/heads/master@{#316195}