*** DO NOT LAND *** Measure the size and complexity of the old multicol implementation.

Source/core/rendering/RenderLayer.h

Index: Source/core/rendering/RenderLayer.h
diff --git a/Source/core/rendering/RenderLayer.h b/Source/core/rendering/RenderLayer.h
index 199b4a78bbcaf05a39dcb8e3083b9726ffc1d541..dcd2f22dfb933374b9ba330de6015c9d9b0f3a00 100644
--- a/Source/core/rendering/RenderLayer.h
+++ b/Source/core/rendering/RenderLayer.h
@@ -171,7 +171,6 @@ public:
     void updateLayerPositionsAfterOverflowScroll();
     void updateLayerPositionsAfterDocumentScroll();
 
-    bool isPaginated() const { return m_isPaginated; }
     RenderLayer* enclosingPaginationLayer() const { return m_enclosingPaginationLayer; }
 
     void updateTransform();
@@ -246,7 +245,7 @@ public:
     bool canUseConvertToLayerCoords() const
     {
         // These RenderObjects have an impact on their layers without the renderers knowing about it.
-        return !renderer()->hasColumns() && !renderer()->hasTransform() && !renderer()->isSVGRoot();
+        return !renderer()->hasTransform() && !renderer()->isSVGRoot();
     }
 
     void convertToPixelSnappedLayerCoords(const RenderLayer* ancestorLayer, IntPoint& location) const;
@@ -493,8 +492,6 @@ private:
     void paintLayerByApplyingTransform(GraphicsContext*, const LayerPaintingInfo&, PaintLayerFlags, const LayoutPoint& translationOffset = LayoutPoint());
     void paintLayerContents(GraphicsContext*, const LayerPaintingInfo&, PaintLayerFlags);
     void paintChildren(unsigned childrenToVisit, GraphicsContext*, const LayerPaintingInfo&, PaintLayerFlags);
-    void paintPaginatedChildLayer(RenderLayer* childLayer, GraphicsContext*, const LayerPaintingInfo&, PaintLayerFlags);
-    void paintChildLayerIntoColumns(RenderLayer* childLayer, GraphicsContext*, const LayerPaintingInfo&, PaintLayerFlags, const Vector<RenderLayer*>& columnLayers, size_t columnIndex);
 
     void collectFragments(LayerFragments&, const RenderLayer* rootLayer, RenderRegion*, const LayoutRect& dirtyRect,
         ClipRectsType, OverlayScrollbarSizeRelevancy inOverlayScrollbarSizeRelevancy = IgnoreOverlayScrollbarSize,
@@ -523,13 +520,6 @@ private:
                              const LayoutRect& hitTestRect, const HitTestLocation&,
                              const HitTestingTransformState* transformState, double* zOffsetForDescendants, double* zOffset,
                              const HitTestingTransformState* unflattenedTransformState, bool depthSortDescendants);
-    RenderLayer* hitTestPaginatedChildLayer(RenderLayer* childLayer, RenderLayer* rootLayer, const HitTestRequest& request, HitTestResult& result,
-                                            const LayoutRect& hitTestRect, const HitTestLocation&,
-                                            const HitTestingTransformState* transformState, double* zOffset);
-    RenderLayer* hitTestChildLayerColumns(RenderLayer* childLayer, RenderLayer* rootLayer, const HitTestRequest& request, HitTestResult& result,
-                                          const LayoutRect& hitTestRect, const HitTestLocation&,
-                                          const HitTestingTransformState* transformState, double* zOffset,
-                                          const Vector<RenderLayer*>& columnLayers, size_t columnIndex);
 
     PassRefPtr<HitTestingTransformState> createLocalTransformState(RenderLayer* rootLayer, RenderLayer* containerLayer,
                             const LayoutRect& hitTestRect, const HitTestLocation&,
@@ -633,8 +623,6 @@ protected:
 
     unsigned m_hasVisibleNonLayerContent : 1;
 
-    unsigned m_isPaginated : 1; // If we think this layer is split by a multi-column ancestor, then this bit will be set.
-
     unsigned m_3DTransformedDescendantStatusDirty : 1;
     // Set on a stacking context layer that has 3D descendants anywhere
     // in a preserves3D hierarchy. Hint to do 3D-aware hit testing.