Get rid of isWritingModeRoot.

sky/engine/core/rendering/RenderBlockFlow.cpp

 /*
  * Copyright (C) 2013 Google 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 376 matching lines @@
         // If an element might be affected by the presence of floats, then always mark it for
         // layout.
         LayoutUnit fb = std::max(previousFloatLogicalBottom, lowestFloatLogicalBottom());
         if (fb > logicalTopEstimate)
             markDescendantsWithFloats = true;
     }
 
     if (childRenderBlockFlow) {
         if (markDescendantsWithFloats)
             childRenderBlockFlow->markAllDescendantsWithFloatsForLayout();
-        if (!child->isWritingModeRoot())
-            previousFloatLogicalBottom = std::max(previousFloatLogicalBottom, oldLogicalTop + childRenderBlockFlow->lowestFloatLogicalBottom());
+        previousFloatLogicalBottom = std::max(previousFloatLogicalBottom, oldLogicalTop + childRenderBlockFlow->lowestFloatLogicalBottom());
     }
 
     SubtreeLayoutScope layoutScope(*child);
 
     bool childHadLayout = child->everHadLayout();
     bool childNeededLayout = child->needsLayout();
     if (childNeededLayout)
         child->layout();
 
     // Cache if we are at the top of the block right now.
@@ skipping 448 matching lines @@
     }
 
     LayoutUnit beforeChildMargin = marginBeforeForChild(child);
     positiveMarginBefore = std::max(positiveMarginBefore, beforeChildMargin);
     negativeMarginBefore = std::max(negativeMarginBefore, -beforeChildMargin);
 
     if (!child->isRenderBlockFlow())
         return;
 
     RenderBlockFlow* childBlockFlow = toRenderBlockFlow(child);
-    if (childBlockFlow->childrenInline() || childBlockFlow->isWritingModeRoot())
+    if (childBlockFlow->childrenInline())
         return;
 
     MarginInfo childMarginInfo(childBlockFlow, childBlockFlow->borderBefore() + childBlockFlow->paddingBefore(), childBlockFlow->borderAfter() + childBlockFlow->paddingAfter());
     if (!childMarginInfo.canCollapseMarginBeforeWithChildren())
         return;
 
     RenderBox* grandchildBox = childBlockFlow->firstChildBox();
     for ( ; grandchildBox; grandchildBox = grandchildBox->nextSiblingBox()) {
         if (!grandchildBox->isFloatingOrOutOfFlowPositioned())
             break;
@@ skipping 178 matching lines @@
         m_rareData = adoptPtr(new RenderBlockFlowRareData(this));
     }
     m_rareData->m_margins.setPositiveMarginAfter(pos);
     m_rareData->m_margins.setNegativeMarginAfter(neg);
 }
 
 bool RenderBlockFlow::mustSeparateMarginBeforeForChild(const RenderBox* child) const
 {
     ASSERT(!child->selfNeedsLayout());
     const RenderStyle* childStyle = child->style();
-    if (!child->isWritingModeRoot())
-        return childStyle->marginBeforeCollapse() == MSEPARATE;
-    return childStyle->marginAfterCollapse() == MSEPARATE;
+    return childStyle->marginBeforeCollapse() == MSEPARATE;
 }
 
 bool RenderBlockFlow::mustSeparateMarginAfterForChild(const RenderBox* child) const
 {
     ASSERT(!child->selfNeedsLayout());
     const RenderStyle* childStyle = child->style();
-    if (!child->isWritingModeRoot())
-        return childStyle->marginAfterCollapse() == MSEPARATE;
-    return childStyle->marginBeforeCollapse() == MSEPARATE;
+    return childStyle->marginAfterCollapse() == MSEPARATE;
 }
 
 void RenderBlockFlow::addOverflowFromFloats()
 {
     // FIXME(sky): Remove this.
 }
 
 void RenderBlockFlow::computeOverflow(LayoutUnit oldClientAfterEdge, bool recomputeFloats)
 {
     RenderBlock::computeOverflow(oldClientAfterEdge, recomputeFloats);
@@ skipping 357 matching lines @@
 RenderBlockFlow::RenderBlockFlowRareData& RenderBlockFlow::ensureRareData()
 {
     if (m_rareData)
         return *m_rareData;
 
     m_rareData = adoptPtr(new RenderBlockFlowRareData(this));
     return *m_rareData;
 }
 
 } // namespace blink