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

Source/core/rendering/RenderDeprecatedFlexibleBox.cpp

 /*
  * This file is part of the render object implementation for KHTML.
  *
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2003 Apple Computer, Inc.
  *
  * 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
@@ skipping 242 matching lines @@
 void RenderDeprecatedFlexibleBox::layoutBlock(bool relayoutChildren)
 {
     ASSERT(needsLayout());
 
     if (!relayoutChildren && simplifiedLayout())
         return;
 
     LayoutRepainter repainter(*this, checkForRepaintDuringLayout());
     LayoutStateMaintainer statePusher(view(), this, locationOffset(), hasTransform() || hasReflection() || style()->isFlippedBlocksWritingMode());
 
-    // Regions changing widths can force us to relayout our children.
     RenderFlowThread* flowThread = flowThreadContainingBlock();
-    if (logicalWidthChangedInRegions(flowThread))
-        relayoutChildren = true;
     if (updateRegionsAndShapesLogicalSize(flowThread))
         relayoutChildren = true;
 
     LayoutSize previousSize = size();
 
     updateLogicalWidth();
     updateLogicalHeight();
 
     if (previousSize != size()
         || (parent()->isDeprecatedFlexibleBox() && parent()->style()->boxOrient() == HORIZONTAL
@@ skipping 142 matching lines @@
         relayoutChildren = false;
         if (oldHeight != height())
             heightSpecified = true;
 
         // Now that our height is actually known, we can place our boxes.
         m_stretchingChildren = (style()->boxAlign() == BSTRETCH);
         for (RenderBox* child = iterator.first(); child; child = iterator.next()) {
             if (child->isOutOfFlowPositioned()) {
                 child->containingBlock()->insertPositionedObject(child);
                 RenderLayer* childLayer = child->layer();
-                childLayer->setStaticInlinePosition(xPos); // FIXME: Not right for regions.
+                childLayer->setStaticInlinePosition(xPos);
                 if (childLayer->staticBlockPosition() != yPos) {
                     childLayer->setStaticBlockPosition(yPos);
                     if (child->style()->hasStaticBlockPosition(style()->isHorizontalWritingMode()))
                         child->setChildNeedsLayout(MarkOnlyThis);
                 }
                 continue;
             }
 
             if (child->style()->visibility() == COLLAPSE) {
                 // visibility: collapsed children do not participate in our positioning.
@@ skipping 217 matching lines @@
     // Our first pass is done without flexing.  We simply lay the children
     // out within the box.
     do {
         setHeight(borderTop() + paddingTop());
         LayoutUnit minHeight = height() + toAdd;
 
         for (RenderBox* child = iterator.first(); child; child = iterator.next()) {
             if (child->isOutOfFlowPositioned()) {
                 child->containingBlock()->insertPositionedObject(child);
                 RenderLayer* childLayer = child->layer();
-                childLayer->setStaticInlinePosition(borderStart() + paddingStart()); // FIXME: Not right for regions.
+                childLayer->setStaticInlinePosition(borderStart() + paddingStart());
                 if (childLayer->staticBlockPosition() != height()) {
                     childLayer->setStaticBlockPosition(height());
                     if (child->style()->hasStaticBlockPosition(style()->isHorizontalWritingMode()))
                         child->setChildNeedsLayout(MarkOnlyThis);
                 }
                 continue;
             }
 
             SubtreeLayoutScope layoutScope(child);
             if (!haveLineClamp && (relayoutChildren || (child->isReplaced() && (child->style()->width().isPercent() || child->style()->height().isPercent()))))
@@ skipping 403 matching lines @@
     if (isPseudoElement())
         return "RenderDeprecatedFlexibleBox (generated)";
     if (isAnonymous())
         return "RenderDeprecatedFlexibleBox (generated)";
     if (isRelPositioned())
         return "RenderDeprecatedFlexibleBox (relative positioned)";
     return "RenderDeprecatedFlexibleBox";
 }
 
 } // namespace WebCore