The TestFailures page should automatically CC the patch author and reviewer when filing a new bug and the guilty revision is known (i.e., the regression range is just a single revision).
We'll probably need to pull this information out of Trac, unless it's possible to get it directly from the svn.webkit.org web interface. Either way, we might need to add some CORS headers to whatever server we end up pulling from to allow XHRs from build.webkit.org to succeed.