Remove CSS regions support, keeping a bare minimum to support "region-based" multicol.

Source/core/rendering/style/StyleRareNonInheritedData.cpp

 /*
  * Copyright (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
@@ skipping 40 matching lines @@
     , m_textDecorationColor(StyleColor::currentColor())
     , m_visitedLinkTextDecorationColor(StyleColor::currentColor())
     , m_visitedLinkBackgroundColor(RenderStyle::initialBackgroundColor())
     , m_visitedLinkOutlineColor(StyleColor::currentColor())
     , m_visitedLinkBorderLeftColor(StyleColor::currentColor())
     , m_visitedLinkBorderRightColor(StyleColor::currentColor())
     , m_visitedLinkBorderTopColor(StyleColor::currentColor())
     , m_visitedLinkBorderBottomColor(StyleColor::currentColor())
     , m_order(RenderStyle::initialOrder())
     , m_objectPosition(RenderStyle::initialObjectPosition())
-    , m_flowThread(RenderStyle::initialFlowThread())
-    , m_regionThread(RenderStyle::initialRegionThread())
-    , m_regionFragment(RenderStyle::initialRegionFragment())
-    , m_regionBreakAfter(RenderStyle::initialPageBreak())
-    , m_regionBreakBefore(RenderStyle::initialPageBreak())
-    , m_regionBreakInside(RenderStyle::initialPageBreak())
     , m_pageSizeType(PAGE_SIZE_AUTO)
     , m_transformStyle3D(RenderStyle::initialTransformStyle3D())
     , m_backfaceVisibility(RenderStyle::initialBackfaceVisibility())
     , m_alignContent(RenderStyle::initialAlignContent())
     , m_alignItems(RenderStyle::initialAlignItems())
     , m_alignItemsOverflowAlignment(RenderStyle::initialAlignItemsOverflowAlignment())
     , m_alignSelf(RenderStyle::initialAlignSelf())
     , m_alignSelfOverflowAlignment(RenderStyle::initialAlignSelfOverflowAlignment())
     , m_justifyContent(RenderStyle::initialJustifyContent())
     , userDrag(RenderStyle::initialUserDrag())
@@ skipping 55 matching lines @@
     , m_textDecorationColor(o.m_textDecorationColor)
     , m_visitedLinkTextDecorationColor(o.m_visitedLinkTextDecorationColor)
     , m_visitedLinkBackgroundColor(o.m_visitedLinkBackgroundColor)
     , m_visitedLinkOutlineColor(o.m_visitedLinkOutlineColor)
     , m_visitedLinkBorderLeftColor(o.m_visitedLinkBorderLeftColor)
     , m_visitedLinkBorderRightColor(o.m_visitedLinkBorderRightColor)
     , m_visitedLinkBorderTopColor(o.m_visitedLinkBorderTopColor)
     , m_visitedLinkBorderBottomColor(o.m_visitedLinkBorderBottomColor)
     , m_order(o.m_order)
     , m_objectPosition(o.m_objectPosition)
-    , m_flowThread(o.m_flowThread)
-    , m_regionThread(o.m_regionThread)
-    , m_regionFragment(o.m_regionFragment)
-    , m_regionBreakAfter(o.m_regionBreakAfter)
-    , m_regionBreakBefore(o.m_regionBreakBefore)
-    , m_regionBreakInside(o.m_regionBreakInside)
     , m_pageSizeType(o.m_pageSizeType)
     , m_transformStyle3D(o.m_transformStyle3D)
     , m_backfaceVisibility(o.m_backfaceVisibility)
     , m_alignContent(o.m_alignContent)
     , m_alignItems(o.m_alignItems)
     , m_alignItemsOverflowAlignment(o.m_alignItemsOverflowAlignment)
     , m_alignSelf(o.m_alignSelf)
     , m_alignSelfOverflowAlignment(o.m_alignSelfOverflowAlignment)
     , m_justifyContent(o.m_justifyContent)
     , userDrag(o.userDrag)
@@ skipping 62 matching lines @@
         && m_visitedLinkTextDecorationColor == o.m_visitedLinkTextDecorationColor
         && m_visitedLinkBackgroundColor == o.m_visitedLinkBackgroundColor
         && m_visitedLinkOutlineColor == o.m_visitedLinkOutlineColor
         && m_visitedLinkBorderLeftColor == o.m_visitedLinkBorderLeftColor
         && m_visitedLinkBorderRightColor == o.m_visitedLinkBorderRightColor
         && m_visitedLinkBorderTopColor == o.m_visitedLinkBorderTopColor
         && m_visitedLinkBorderBottomColor == o.m_visitedLinkBorderBottomColor
         && m_order == o.m_order
         && m_objectPosition == o.m_objectPosition
         && m_callbackSelectors == o.m_callbackSelectors
-        && m_flowThread == o.m_flowThread
-        && m_regionThread == o.m_regionThread
-        && m_regionFragment == o.m_regionFragment
-        && m_regionBreakAfter == o.m_regionBreakAfter
-        && m_regionBreakBefore == o.m_regionBreakBefore
-        && m_regionBreakInside == o.m_regionBreakInside
         && m_pageSizeType == o.m_pageSizeType
         && m_transformStyle3D == o.m_transformStyle3D
         && m_backfaceVisibility == o.m_backfaceVisibility
         && m_alignContent == o.m_alignContent
         && m_alignItems == o.m_alignItems
         && m_alignItemsOverflowAlignment == o.m_alignItemsOverflowAlignment
         && m_alignSelf == o.m_alignSelf
         && m_alignSelfOverflowAlignment == o.m_alignSelfOverflowAlignment
         && m_justifyContent == o.m_justifyContent
         && userDrag == o.userDrag
@@ skipping 77 matching lines @@
         return false;
     return true;
 }
 
 bool StyleRareNonInheritedData::hasFilters() const
 {
     return m_filter.get() && !m_filter->m_operations.isEmpty();
 }
 
 } // namespace WebCore