message: Bump BUILD number from 20 to 21.
  REF_BUG=
  REF_CL=150832287
  REF_TIME=2017-03-22T10:41:05+09:00
  REF_TIME_RAW=1490146865 +0900
diff: # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  MAJOR=2
  -MINOR=20
  -BUILD=2699
  +MINOR=21
  +BUILD=2700
  REVISION=102
  # This version represents the version of Mozc IME engine (converter, predictor,
  # etc.). This version info is included both in the Mozc server and in the Mozc
  