Added missing import.

I accidentally blew away my changes just before the last commit and
made a mistake while recreating it.

BUG=365904,368107
TBR=bajones@chromium.org

Review URL: https://codereview.chromium.org/259363002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@266930 0039d316-1c4b-4281-b951-d872f2087c98
1 file changed