tree 2a5463bdfe04884704d22faabe615eef7fcb215d
parent f62dda5ad1283cdfcc5e52e559963d620cf22a14
author simon.fraser@apple.com <simon.fraser@apple.com@268f45cc-cd09-0410-ab3c-d52691b4dbfc> 1557513658 +0000
committer simon.fraser@apple.com <simon.fraser@apple.com@268f45cc-cd09-0410-ab3c-d52691b4dbfc> 1557513658 +0000

ASSERT(isSelfPaintingLayer() || hasSelfPaintingLayerDescendant()) on nytimes.com after r245170
https://bugs.webkit.org/show_bug.cgi?id=197776

Reviewed by Zalan Bujtas.

Source/WebCore:

Only try to paint into shared backing for layers that are able to be composited. This
avoids trying to do sharing for non-self-painting layers, which doesn't make sense.

Test: compositing/shared-backing/overflow-scroll/non-self-painting-layer-should-not-share.html

* rendering/RenderLayerCompositor.cpp:
(WebCore::RenderLayerCompositor::computeCompositingRequirements):

LayoutTests:

* compositing/shared-backing/overflow-scroll/non-self-painting-layer-should-not-share-expected.txt: Added.
* compositing/shared-backing/overflow-scroll/non-self-painting-layer-should-not-share.html: Added.


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@245181 268f45cc-cd09-0410-ab3c-d52691b4dbfc