This upstreams crbug.com/157020 that aims to add an UMA instrumentation for tracking ShadowRoot usage.
Created attachment 169845 [details] Patch
Comment on attachment 169845 [details] Patch Attachment 169845 [details] did not pass chromium-ews (chromium-xvfb): Output: http://queues.webkit.org/results/14496238 New failing tests: fast/dom/shadow/shadow-root-js-api.html
Comment on attachment 169845 [details] Patch Can you fix the layout test before landing?
Created attachment 170041 [details] Patch for landing
Comment on attachment 170041 [details] Patch for landing Clearing flags on attachment: 170041 Committed r132171: <http://trac.webkit.org/changeset/132171>
All reviewed patches have been landed. Closing bug.