Have FontBuilder::initForStyleResolve() take a Document reference

Source/core/css/resolver/FontBuilder.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2013 Google 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.
  *
@@ skipping 24 matching lines @@
 class RenderStyle;
 
 class FontDescriptionChangeScope;
 
 class FontBuilder {
     WTF_MAKE_NONCOPYABLE(FontBuilder); WTF_MAKE_FAST_ALLOCATED;
 public:
     FontBuilder();
 
     // FIXME: The name is probably wrong, but matches StyleResolverState callsite for consistency.
-    void initForStyleResolve(const Document*, RenderStyle*, bool useSVGZoomRules);
+    void initForStyleResolve(const Document&, RenderStyle*, bool useSVGZoomRules);
     void clear();
 
     void setInitial(float effectiveZoom);
 
     void didChangeFontParameters(bool);
 
     void inheritFrom(const FontDescription&);
     void fromSystemFont(CSSValueID, float effectiveZoom);
 
     void setFontFamilyInitial(float effectiveZoom);
@@ skipping 58 matching lines @@
     // object on RenderStyle from various other font-related
     // properties on RenderStyle. Whenever one of those
     // is changed, FontBuilder tracks the need to update
     // style->font() with this bool.
     bool m_fontDirty;
 };
 
 }
 
 #endif