[Webkit-unassigned] [Bug 119302] New: Remove Node::parentNodeForRenderingAndStyle and switch to parentRenderStyle

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=119302

           Summary: Remove Node::parentNodeForRenderingAndStyle and switch
                    to parentRenderStyle
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: NEW
          Keywords: BlinkMergeCandidate
          Severity: Normal
          Priority: P2
         Component: HTML DOM
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: rniwa at webkit.org
                CC: koivisto at iki.fi, simon.fraser at apple.com,
                    benjamin at webkit.org, akling at apple.com


Consider merging https://chromium.googlesource.com/chromium/blink/+/6e06fff5245bba0bd6a0ed2be3fe86df6dc724da

parentNodeForRenderingAndStyle() was a complicated way of doing NodeRenderingTraversal::parent.
This switches to that, but more importantly it makes us stop calling into the
ComposedShadowTreeWalker::traverseParent twice during recalcStyle which was crazy since that's
tons of code to do twice just for a ternary.


These traversal classes :(

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