Currently, if you load https://test-results.appspot.com/dashboards/flakiness_dashboard.html#testType=webkit_layout_tests, it errors. This is what's on the console:

builders.js:81 No master and builder found for webkit_tests
builders.getBuilders @ builders.js:81
load @ loader.js:99
(anonymous) @ flakiness_dashboard.js:1631
load (async)
(anonymous) @ flakiness_dashboard.js:1629
loader.js:120 Uncaught TypeError: Cannot read property 'forEach' of undefined
    at loader.Loader._loadResultsFiles (loader.js:120)
    at loader.Loader.load (loader.js:102)
    at flakiness_dashboard.js:1631
_loadResultsFiles @ loader.js:120
load @ loader.js:102
(anonymous) @ flakiness_dashboard.js:1631
load (async)
(anonymous) @ flakiness_dashboard.js:1629
loader.js:227 Uncaught TypeError: Cannot read property 'length' of undefined
    at loader.Loader._haveResultsFilesLoaded (loader.js:227)
    at loader.Loader._handleResourceLoad (loader.js:214)
    at loader.Loader._handleResultsFileLoaded (loader.js:156)
    at loader.js:140
    at base.js:45
    at XMLHttpRequest.xhr.onreadystatechange (loader.js:54)

Not sure if anything changed; I know that I did change some stuff with layout test uploading results, but only to cloud storage AFAIK. I don't think that should have affected uploading results to test results.