tree efebbb78471d5515b2fac637a0c30393598d97bc
parent 8e4dedc223b7ffc3048e650be99bdd4135975194
author Toshiyuki Hanaoka <toshiyuki@google.com> 1430604250 -0700
committer Yohei Yukawa <yukawa@google.com> 1430604250 -0700

Implement rule based zero query suggestion.

BUG=none
TEST=unittest