Allow braille translation result to be larger than twice the size of the input.

The liblouis wrapper used to allocate an output buffer that was twice as big
as the number of input characters.  There are situations where this is
not enough.  The new approach is to retry with a larger buffer up to
a certain limit.

R=dtseng@chromium.org
BUG=none

Review URL: https://codereview.chromium.org/124403002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@243251 0039d316-1c4b-4281-b951-d872f2087c98
Remove notifications from PrintPreviewDialogController.

BUG=170921
TEST=everything still works

Review URL: https://codereview.chromium.org/124673002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@243252 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 243252