When many canvases are being instrumented we'll want to show replay screenshots for each canvas. Meanwhile, show the screenshot of the last-touched canvas during the current replay. Patch to follow.
Created attachment 176957 [details] Patch
Comment on attachment 176957 [details] Patch Clearing flags on attachment: 176957 Committed r136418: <http://trac.webkit.org/changeset/136418>
All reviewed patches have been landed. Closing bug.