Fix braille backtranslation size limit.

Fix braille backtranslation size limit.

Sometimes, a contracted string results in more than twice the
size of the input being the result of back translation.  This is especially
true for small strings (e.g. a single letter k translating to knowledgable).

This CL uses a similar approach as
https://codereview.chromium.org/124403002
expanding the allocated buffer, working around liblouis api quirks.

BUG=310285
R=dtseng@chromium.org

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=254023

[David Tseng, 2014-02-27 22:05:06]

https://codereview.chromium.org/183653002/diff/1/third_party/liblouis/nacl_wr...
File third_party/liblouis/nacl_wrapper/liblouis_wrapper.cc (right):

https://codereview.chromium.org/183653002/diff/1/third_party/liblouis/nacl_wr...
third_party/liblouis/nacl_wrapper/liblouis_wrapper.cc:226: // and we have to
retry with a larger buffer.
nit: |inbuf| and smiliarly below.

[David Tseng, 2014-02-27 22:07:04]

LGTM

[Peter Lundblad, 2014-02-27 23:00:35]

The CQ bit was checked by plundblad@chromium.org

[commit-bot: I haz the power, 2014-02-27 23:04:30]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/plundblad@chromium.org/183653002/1

[commit-bot: I haz the power, 2014-02-28 01:11:51]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/plundblad@chromium.org/183653002/1

[commit-bot: I haz the power, 2014-02-28 02:20:59]

Change committed as 254023