[Webkit-unassigned] [Bug 116488] New: Readd asserts against calling mapAbsoluteToLocalPoint during layout

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=116488

           Summary: Readd asserts against calling mapAbsoluteToLocalPoint
                    during layout
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Layout and Rendering
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: rniwa at webkit.org
                CC: hyatt at apple.com, simon.fraser at apple.com


Consider merging https://chromium.googlesource.com/chromium/blink/+/7928f8a58d115b0672791cacdf1c93a9231ca320

I removed these assertions in r127681 for centering <dialog> in the
viewport. It was incorrect to do so: converting from absolute to local
coordinates during a renderer's layout incorrectly assumes its ancestors
have been already laid out. Now that dialog's containing block is the
initial containing block, it's no longer necessary to convert.

The assertions were originally added in r38186 and r50184.

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