Change RenderObject::style(bool) to accept an enum instead

Source/core/rendering/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 130 matching lines @@
         ASSERT_NOT_REACHED();
         return FloatRect();
     }
 
     bool isConstructed() { return m_bitfields.constructed(); }
     virtual void setConstructed() { m_bitfields.setConstructed(true); }
 
     void setExtracted(bool extracted = true) { m_bitfields.setExtracted(extracted); }
 
     void setFirstLineStyleBit(bool firstLine) { m_bitfields.setFirstLine(firstLine); }
-    bool isFirstLineStyle() const { return m_bitfields.firstLine(); }
+    OwnOrFirstLineStyle isFirstLineStyle() const { return m_bitfields.firstLine() ? FirstLineStyle : OwnStyle; }
 
     void remove(MarkLineBoxes = MarkLineBoxesDirty);
 
     InlineBox* nextOnLine() const { return m_next; }
     InlineBox* prevOnLine() const { return m_prev; }
     void setNextOnLine(InlineBox* next)
     {
         ASSERT(m_parent || !next);
         m_next = next;
     }
@@ skipping 107 matching lines @@
     virtual float placeEllipsisBox(bool ltr, float visibleLeftEdge, float visibleRightEdge, float ellipsisWidth, float &truncatedWidth, bool&);
 
 #ifndef NDEBUG
     void setHasBadParent();
 #endif
 
     int expansion() const { return m_bitfields.expansion(); }
 
     bool visibleToHitTestRequest(const HitTestRequest& request) const { return renderer().visibleToHitTestRequest(request); }
 
-    EVerticalAlign verticalAlign() const { return renderer().style(m_bitfields.firstLine())->verticalAlign(); }
+    EVerticalAlign verticalAlign() const { return renderer().style(m_bitfields.firstLine() ? FirstLineStyle : OwnStyle)->verticalAlign(); }
 
     // Use with caution! The type is not checked!
     RenderBoxModelObject* boxModelObject() const
     {
         if (!renderer().isText())
             return toRenderBoxModelObject(&renderer());
         return 0;
     }
 
     FloatPoint locationIncludingFlipping();
@@ skipping 150 matching lines @@
 
 } // namespace WebCore
 
 #ifndef NDEBUG
 // Outside the WebCore namespace for ease of invocation from gdb.
 void showTree(const WebCore::InlineBox*);
 void showLineTree(const WebCore::InlineBox*);
 #endif
 
 #endif // InlineBox_h