138383 2014-11-04 16:02:16 -0800 Backing store removal doesn't respond to dynamic changes on children 2014-11-04 16:02:31 -0800 1 1 1 Unclassified WebKit Layout and Rendering 528+ (Nightly build) Unspecified Unspecified ASSIGNED P2 Normal --- 1 simon.fraser simon.fraser simon.fraser oldest_to_newest 1046244 0 240973 simon.fraser 2014-11-04 16:02:16 -0800 Created attachment 240973 Testcase When we optimize away backing store on layers with non-painting children, we don't correctly handle dynamic changes on the style of those children. See testcase. 240973 2014-11-04 16:02:16 -0800 2014-11-04 16:02:16 -0800 Testcase unpainting-children.html text/html 743 simon.fraser PCFET0NUWVBFIGh0bWw+Cgo8aHRtbD4KPGhlYWQ+CiAgICA8c3R5bGU+CiAgICAgICAgLmJveCB7 CiAgICAgICAgICAgIHBvc2l0aW9uOiByZWxhdGl2ZTsKICAgICAgICAgICAgbWFyZ2luOiA1MHB4 OwogICAgICAgICAgICBoZWlnaHQ6IDEwMHB4OwogICAgICAgICAgICB3aWR0aDogMTAwcHg7CiAg ICAgICAgfQogICAgICAgIAogICAgICAgIC5jaGlsZCB7CiAgICAgICAgICAgIHBvc2l0aW9uOiBh YnNvbHV0ZTsKICAgICAgICAgICAgbWFyZ2luOiAwOwogICAgICAgICAgICB0b3A6IDMwcHg7CiAg ICAgICAgICAgIGxlZnQ6IDMwcHg7CiAgICAgICAgfQogICAgICAgIAogICAgICAgIC5jb21wb3Np dGVkIHsKICAgICAgICAgICAgLXdlYmtpdC10cmFuc2Zvcm06IHRyYW5zbGF0ZVooMCk7CiAgICAg ICAgfQogICAgICAgIAogICAgICAgIC5oaWRkZW4gewogICAgICAgICAgICBiYWNrZ3JvdW5kOiBu b25lOwogICAgICAgIH0KICAgICAgICAKICAgICAgICAuY2hpbGQuaGlkZGVuOmhvdmVyIHsKICAg ICAgICAgICAgYmFja2dyb3VuZC1jb2xvcjogc2lsdmVyOwogICAgICAgIH0KICAgIDwvc3R5bGU+ CjwvaGVhZD4KPGJvZHk+Cgo8cD5Ib3ZlcmluZyBpbiB0aGUgYm94IGJlbG93IHNob3cgcmV2ZWFs IGEgY2hpbGQgYm94PC9wPgo8ZGl2IGNsYXNzPSJjb21wb3NpdGVkIGJveCI+CiAgICA8ZGl2IGNs YXNzPSJoaWRkZW4gY2hpbGQgYm94Ij4KICAgIDwvZGl2Pgo8L2Rpdj4KCjwvYm9keT4KPC9odG1s Pgo=