Vertical-aligned of LayoutText should not contribute to a layout.

Source/core/layout/line/InlineBox.h

 /*
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2009, 2010, 2011 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,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 261 matching lines @@
     virtual LayoutUnit placeEllipsisBox(bool ltr, LayoutUnit visibleLeftEdge, LayoutUnit visibleRightEdge, LayoutUnit ellipsisWidth, LayoutUnit &truncatedWidth, bool&);
 
 #if ENABLE(ASSERT)
     void setHasBadParent();
 #endif
 
     int expansion() const { return m_bitfields.expansion(); }
 
     bool visibleToHitTestRequest(const HitTestRequest& request) const { return layoutObject().visibleToHitTestRequest(request); }
 
-    EVerticalAlign verticalAlign() const { return layoutObject().style(m_bitfields.firstLine())->verticalAlign(); }
+    EVerticalAlign verticalAlign() const { return layoutObject().isText() ? layoutObject().styleRef().initialVerticalAlign() : layoutObject().style(m_bitfields.firstLine())->verticalAlign(); }

[mstensho (USE GERRIT), 2015/06/10 11:40:41]

initialVerticalAlign() is static, so you don't need an object to call it.

 
     // Use with caution! The type is not checked!
     LayoutBoxModelObject* boxModelObject() const
     {
         if (!layoutObject().isText())
             return toLayoutBoxModelObject(&layoutObject());
         return 0;
     }
 
     LayoutPoint locationIncludingFlipping();
@@ skipping 157 matching lines @@
 
 } // namespace blink
 
 #ifndef NDEBUG
 // Outside the WebCore namespace for ease of invocation from gdb.
 void showTree(const blink::InlineBox*);
 void showLineTree(const blink::InlineBox*);
 #endif
 
 #endif // InlineBox_h