Support enclosing fragmentainer breaks inside spanners.

third_party/WebKit/Source/core/layout/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 34 matching lines @@
     view.pushLayoutState(*this);
 }
 
 LayoutState::LayoutState(LayoutBox& layoutObject, const LayoutSize& offset, LayoutUnit pageLogicalHeight, bool pageLogicalHeightChanged, bool containingBlockLogicalWidthChanged)
     : m_containingBlockLogicalWidthChanged(containingBlockLogicalWidthChanged)
     , m_next(layoutObject.view()->layoutState())
     , m_layoutObject(layoutObject)
 {
     if (layoutObject.isLayoutFlowThread())
         m_flowThread = toLayoutFlowThread(&layoutObject);
-    else if (!layoutObject.isOutOfFlowPositioned() && !layoutObject.isColumnSpanAll())
+    else if (!layoutObject.isOutOfFlowPositioned())
         m_flowThread = m_next->flowThread();
     else
         m_flowThread = nullptr;
     layoutObject.view()->pushLayoutState(*this);
     bool fixed = layoutObject.isOutOfFlowPositioned() && layoutObject.style()->position() == FixedPosition;
     if (fixed) {
         // FIXME: This doesn't work correctly with transforms.
         FloatPoint fixedOffset = layoutObject.view()->localToAbsolute(FloatPoint(), IsFixed);
         m_layoutOffset = LayoutSize(fixedOffset.x(), fixedOffset.y()) + offset;
     } else {
@@ skipping 70 matching lines @@
 }
 
 LayoutUnit LayoutState::pageLogicalOffset(const LayoutBox& child, const LayoutUnit& childLogicalOffset) const
 {
     if (child.isHorizontalWritingMode())
         return m_layoutOffset.height() + childLogicalOffset - m_pageOffset.height();
     return m_layoutOffset.width() + childLogicalOffset - m_pageOffset.width();
 }
 
 } // namespace blink