[Webkit-unassigned] [Bug 58414] Style change in invisible iframes can cause accelerated content to disappear

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=58414





--- Comment #27 from Vangelis Kokkevis <vangelis at chromium.org>  2011-04-19 10:19:50 PST ---
What if we modify RenderLayerCompositor::shouldPropagateCompositingToEnclosingIFrame() and return true when (ownerElement != NULL) && (renderer == NULL)  (modulo whatever special treatment needs to happen on the mac)? 

That won't disturb the existing compositor's root layer if an enclosed iframe doesn't have a renderer (e.g. hidden) which seems to be the root of the issue here.

The only side-effect appears to be that if the enclosed iframe would have triggered the compositor, we would propagate compositing up to the parent even if the iframe is hidden.  I wouldn't think that would be a big issue though.

A local patch of this change seems to be work fine.

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