Add two retina bots to scheduler.
Add two retina bots to scheduler.

BUG=
TEST=two bots triggered by incoming CLs

Review URL: https://chromiumcodereview.appspot.com/10828315

git-svn-id: 239fca9b83025a0b6f823aeeca02ba5be3d9fd76@151568 0039d316-1c4b-4281-b951-d872f2087c98

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