Don't paint self-painting frameset frames in the layout tree paint recursion.

Source/core/paint/FrameSetPainter.cpp

Index: Source/core/paint/FrameSetPainter.cpp
diff --git a/Source/core/paint/FrameSetPainter.cpp b/Source/core/paint/FrameSetPainter.cpp
index 48161d2f58b9ef17624cb951b96390fc94052296..e61c55d4524873a4ec874a8d5c81584a53810b60 100644
--- a/Source/core/paint/FrameSetPainter.cpp
+++ b/Source/core/paint/FrameSetPainter.cpp
@@ -115,6 +115,9 @@ void FrameSetPainter::paintChildren(const PaintInfo& paintInfo, const LayoutPoin
     size_t cols = m_layoutFrameSet.columns().m_sizes.size();
     for (size_t r = 0; r < rows; r++) {
         for (size_t c = 0; c < cols; c++) {
+            // Self-painting layers are painted during the DeprecatedPaintLayer paint recursion, not LayoutObject.
+            if (child->isLayoutBoxModelObject() && toLayoutBoxModelObject(child)->hasSelfPaintingLayer())
+                continue;
             child->paint(paintInfo, adjustedPaintOffset);
             child = child->nextSibling();
             if (!child)