Don't always make backing store for -webkit-backface-visibility:hidden
<rdar://problem/15499540>
Created attachment 230563 [details] Patch
Comment on attachment 230563 [details] Patch Attachment 230563 [details] did not pass mac-wk2-ews (mac-wk2): Output: http://webkit-queues.appspot.com/results/4971590622117888 New failing tests: inspector-protocol/layers/layers-anonymous.html
Created attachment 230566 [details] Archive of layout-test-results from webkit-ews-13 for mac-mountainlion-wk2 The attached test failures were seen while running run-webkit-tests on the mac-wk2-ews. Bot: webkit-ews-13 Port: mac-mountainlion-wk2 Platform: Mac OS X 10.8.5
Created attachment 230575 [details] Archive of layout-test-results from webkit-ews-06 for mac-mountainlion The attached test failures were seen while running run-webkit-tests on the mac-ews. Bot: webkit-ews-06 Port: mac-mountainlion Platform: Mac OS X 10.8.5
Created attachment 230602 [details] Patch
https://trac.webkit.org/r168119
Comment on attachment 230602 [details] Patch Sam reviewed
This caused a regression, as bug 132801.