Get rid of isWritingModeRoot.

sky/engine/core/rendering/RenderBox.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2005 Allan Sandfeld Jensen (kde@carewolf.com)
  *           (C) 2005, 2006 Samuel Weinig (sam.weinig@gmail.com)
  * Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2013 Adobe Systems Incorporated. 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
@@ skipping 3444 matching lines @@
 }
 
 static bool isReplacedElement(Node* node)
 {
     // Checkboxes and radioboxes are not isReplaced() nor do they have their own renderer in which to override avoidFloats().
     return node && node->isElementNode() && toElement(node)->isFormControlElement();
 }
 
 bool RenderBox::avoidsFloats() const
 {
-    return isReplaced() || isReplacedElement(node()) || hasOverflowClip() || isWritingModeRoot() || isFlexItemIncludingDeprecated();
+    return isReplaced() || isReplacedElement(node()) || hasOverflowClip() || isFlexItemIncludingDeprecated();
 }
 
 InvalidationReason RenderBox::getPaintInvalidationReason(const RenderLayerModelObject& paintInvalidationContainer,
     const LayoutRect& oldBounds, const LayoutPoint& oldLocation, const LayoutRect& newBounds, const LayoutPoint& newLocation)
 {
     InvalidationReason invalidationReason = RenderBoxModelObject::getPaintInvalidationReason(paintInvalidationContainer, oldBounds, oldLocation, newBounds, newLocation);
     if (invalidationReason != InvalidationNone && invalidationReason != InvalidationIncremental)
         return invalidationReason;
 
     if (!style()->hasBackground() && !style()->hasBoxDecorations())
@@ skipping 501 matching lines @@
 
 RenderBox::BoxDecorationData::BoxDecorationData(const RenderStyle& style)
 {
     backgroundColor = style.colorIncludingFallback(CSSPropertyBackgroundColor);
     hasBackground = backgroundColor.alpha() || style.hasBackgroundImage();
     ASSERT(hasBackground == style.hasBackground());
     hasBorder = style.hasBorder();
 }
 
 } // namespace blink