Remove exhuberant import for FilterSuggestionBuilder.

BUG=
NOTRY=true
TBR=apavlov@chromium.org

Review URL: https://codereview.chromium.org/195733006

git-svn-id: svn://svn.chromium.org/blink/trunk@169127 bbb929c8-8fbe-4397-9dbb-9b2b20218538