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Capitalization change for regionlayoutupdate

If you have been experimenting with CSS Regions in Chrome Canary or some other browser built from WebKit trunk, there has been a minor change you may need to account for.

If you have code that used the regionLayoutUpdate event, note that the capitalization of this event has changed to regionlayoutupdate to match other DOM Level 3 events like mouseover and compositionupdate. The event in the latest WebKit builds is now webkitregionlayoutupdate, a change tracked in WebKit bug 100355. If your code using the event suddenly stops working with a new WebKit build, this is likely the culprit.

And remember the CSS Regions functionality remains behind a run-time flag.

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