Turns out that my build fix in http://trac.webkit.org/changeset/199251 breaks other usage of RemoteAPI. Fix it properly by escaping builder names in BuildbotSyncer's methods.
Created attachment 276053 [details] Fixes the bug
Created attachment 276075 [details] Fixed one more bug
Thanks for the reviews!
Committed r199266: <http://trac.webkit.org/changeset/199266>