[Webkit-unassigned] [Bug 138383] New: Backing store removal doesn't respond to dynamic changes on children

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=138383

            Bug ID: 138383
           Summary: Backing store removal doesn't respond to dynamic
                    changes on children
    Classification: Unclassified
           Product: WebKit
           Version: 528+ (Nightly build)
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Layout and Rendering
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: simon.fraser at apple.com

Created attachment 240973
  --> https://bugs.webkit.org/attachment.cgi?id=240973&action=review
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.

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