[wk2] Page Overlays: Hook up the layer border/repaint counter setting to the overlay layer
https://bugs.webkit.org/show_bug.cgi?id=111547
<rdar://problem/13355801>

Reviewed by Simon Fraser.

* WebProcess/WebPage/mac/TiledCoreAnimationDrawingArea.mm:
(WebKit::TiledCoreAnimationDrawingArea::updatePreferences):
(WebKit::TiledCoreAnimationDrawingArea::createPageOverlayLayer):
Keep the page overlay layer's debug border and repaint counter settings updated.


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@144960 268f45cc-cd09-0410-ab3c-d52691b4dbfc