Add a single branch scheduler for Skia
Add a single branch scheduler for Skia

Some bots need this.

BUG=skia:3225

Review URL: https://codereview.chromium.org/797523004

git-svn-id: 239fca9b83025a0b6f823aeeca02ba5be3d9fd76@293354 0039d316-1c4b-4281-b951-d872f2087c98

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