Revert "Allow to set display "inline" on legend element"

third_party/WebKit/Source/core/layout/LayoutFieldset.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004, 2005, 2006 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
  * version 2 of the License, or (at your option) any later version.
@@ skipping 199 matching lines @@
   }
   return legend;
 }
 
 LayoutBox* LayoutFieldset::findInFlowLegend() const {
   for (LayoutObject* legend = firstChild(); legend;
        legend = legend->nextSibling()) {
     if (legend->isFloatingOrOutOfFlowPositioned())
       continue;
 
-    if (isHTMLLegendElement(legend->node())) {
-      if (legend->isBox())
-        return toLayoutBox(legend);
-    }
+    if (isHTMLLegendElement(legend->node()))
+      return toLayoutBox(legend);
   }
   return nullptr;
 }
 
 void LayoutFieldset::paintBoxDecorationBackground(
     const PaintInfo& paintInfo,
     const LayoutPoint& paintOffset) const {
   FieldsetPainter(*this).paintBoxDecorationBackground(paintInfo, paintOffset);
 }
 
@@ skipping 60 matching lines @@
     LayoutFlexibleBox::removeChild(oldChild);
     m_innerBlock = nullptr;
   } else if (oldChild->parent() == this) {
     LayoutFlexibleBox::removeChild(oldChild);
   } else if (m_innerBlock) {
     m_innerBlock->removeChild(oldChild);
   }
 }
 
 }  // namespace blink