Use the normal LayoutState constructor in RenderTableSection.

Source/core/rendering/LayoutState.cpp

 /*
  * Copyright (C) 2007 Apple Inc.  All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 94 matching lines @@
 LayoutState::LayoutState(RenderObject& root)
     : m_isPaginated(false)
     , m_pageLogicalHeightChanged(false)
     , m_containingBlockLogicalWidthChanged(false)
     , m_flowThread(0)
     , m_columnInfo(0)
     , m_next(root.view()->layoutState())
     , m_pageLogicalHeight(0)
     , m_renderer(root)
 {
-    // FIXME: Why does RenderTableSection create this wonky LayoutState?
-    ASSERT(!m_next || root.isTableSection());
+    ASSERT(!m_next);
     // We'll end up pushing in RenderView itself, so don't bother adding it.
     if (root.isRenderView())
         return;
 
     root.view()->pushLayoutState(*this);
 
     RenderObject* container = root.container();
     FloatPoint absContentPoint = container->localToAbsolute(FloatPoint(), UseTransforms);
     m_layoutOffset = LayoutSize(absContentPoint.x(), absContentPoint.y());
 }
@@ skipping 21 matching lines @@
 }
 
 void LayoutState::addForcedColumnBreak(const RenderBox& child, const LayoutUnit& childLogicalOffset)
 {
     if (!m_columnInfo || m_columnInfo->columnHeight())
         return;
     m_columnInfo->addForcedBreak(pageLogicalOffset(child, childLogicalOffset));
 }
 
 } // namespace blink