[Webkit-unassigned] [Bug 67548] New: RenderLayer::computeOffsetFromRoot traverses the layer's tree twice

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=67548

           Summary: RenderLayer::computeOffsetFromRoot traverses the
                    layer's tree twice
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Layout and Rendering
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: jchaffraix at webkit.org
                CC: simon.fraser at apple.com
        Depends on: 66901


This is actually a common pattern in RenderLayer to do 2 traversals (one to get the root() and the other one to compute our position relative to it).

By tweaking the way we traverse the tree, we should be able to squash those 2 traversals in one.

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