[Webkit-unassigned] [Bug 63282] New: [Safari] layoutTestController.layerTreeAsText doesn't work for iframes

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=63282

           Summary: [Safari] layoutTestController.layerTreeAsText doesn't
                    work for iframes
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Tools / Tests
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: enne at google.com
                CC: simon.fraser at apple.com, jamesr at chromium.org


In trying to fix bug 60741, I wrote some tests of compositing in an iframe.  The iframe source page contains a compositing trigger, e.g. tranformZ(0).  The containing page has no compositing trigger.  The contents of the iframe get composited properly, but layoutTestController.layerTreeAsText returns nothing unless there is a compositing trigger on the containing page as well.

This can be reproduced by adding these three attached files to LayoutTests/compositing and running run-webkit-tests.  Chromium prints out the expected results, but Safari prints nothing.

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