Compile braille ime among other compiled js resources.
This includes the braille IME in the compiled js resources. As a cleanup,
most of the braille IME externs are removed, consolidating with the
central location in third_party/closure_compiler. The compiler
used for checking braille IME and chroemvox in the presubmit scripts is
chagned to the one in top-level third_party, isntead of the one
in blink.
R=dtseng, tbreisacher
BUG=
Review URL: https://codereview.chromium.org/
665633002
Cr-Commit-Position: refs/heads/master@{#301327}