Created attachment 104328 [details]
Assume you have a flow thread that is displayed in one or more regions. If the content is larger than the size of all regions, some content will not be displayed. You should not be able to scroll the content in regions so that the remaining content is displayed.
I will attach a test for the bug. I will upload the patch too once 66142 lands in mainline.
Created attachment 104479 [details]
Comment on attachment 104479 [details]
Clearing flags on attachment: 104479
Committed r93428: <http://trac.webkit.org/changeset/93428>
All reviewed patches have been landed. Closing bug.
This caused fast/repaint/japanese-rl-selection-repaint-in-regions.html to start failing. The new version seems correct so I will rebaseline on mac + chromium when the bots cycle.