Cleanup: Replace adjustForColumns() / offsetForColumns() with columnOffset().

Source/core/rendering/RenderLayer.cpp

Index: Source/core/rendering/RenderLayer.cpp
diff --git a/Source/core/rendering/RenderLayer.cpp b/Source/core/rendering/RenderLayer.cpp
index 02a6ec68033e3dc740feed737558fc6c1b9e3ea8..0141f0156e789279d3fb232e1437b74b79fe3473 100644
--- a/Source/core/rendering/RenderLayer.cpp
+++ b/Source/core/rendering/RenderLayer.cpp
@@ -980,13 +980,10 @@ bool RenderLayer::updateLayerPosition()
         if (hasCompositedLayerMapping()) {
             // FIXME: Composited layers ignore pagination, so about the best we can do is make sure they're offset into the appropriate column.
             // They won't split across columns properly.
-            LayoutSize columnOffset;
             if (!parent()->renderer()->hasColumns() && parent()->renderer()->isDocumentElement() && renderer()->view()->hasColumns())
-                renderer()->view()->adjustForColumns(columnOffset, localPoint);
+                localPoint += renderer()->view()->columnOffset(localPoint);
             else
-                parent()->renderer()->adjustForColumns(columnOffset, localPoint);
-
-            localPoint += columnOffset;
+                localPoint += parent()->renderer()->columnOffset(localPoint);
         }
 
         if (parent()->renderer()->hasOverflowClip()) {