Add factory to use sharding_supervisor on fyi waterfall.
Add factory to use sharding_supervisor on fyi waterfall.

Review URL: http://codereview.chromium.org/7492018

git-svn-id: 239fca9b83025a0b6f823aeeca02ba5be3d9fd76@93674 0039d316-1c4b-4281-b951-d872f2087c98

eunchong/build,eunchong/build,eunchong/build,eunchong/build