Miscellaneous cleanup to reduce number of includes in platform/graphics/

Source/core/css/CSSPrimitiveValue.cpp

 /*
  * (C) 1999-2003 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2012 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,
@@ skipping 19 matching lines @@
 #include "core/css/Counter.h"
 #include "core/css/Pair.h"
 #include "core/css/RGBColor.h"
 #include "core/css/Rect.h"
 #include "core/css/StyleSheetContents.h"
 #include "core/dom/ExceptionCode.h"
 #include "core/dom/Node.h"
 #include "core/dom/WebCoreMemoryInstrumentation.h"
 #include "core/platform/LayoutUnit.h"
 #include "core/platform/graphics/Color.h"
+#include "core/platform/graphics/FontMetrics.h"
 #include "core/rendering/style/RenderStyle.h"
 #include "wtf/DecimalNumber.h"
 #include "wtf/StdLibExtras.h"
 #include "wtf/text/StringBuffer.h"
 #include "wtf/text/StringBuilder.h"
 
 using namespace WTF;
 
 namespace WebCore {
 
@@ skipping 1271 matching lines @@
         break;
     case CSS_CALC:
         info.addMember(m_value.calc, "value.calc");
         break;
     default:
         break;
     }
 }
 
 } // namespace WebCore