Forward declare StyleVariableData in StyleRareInheritedData instead of including it

third_party/WebKit/Source/core/css/ComputedStyleCSSValueMapping.cpp

 /*
  * Copyright (C) 2004 Zack Rusin <zack@kde.org>
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2007 Alexey Proskuryakov <ap@webkit.org>
  * Copyright (C) 2007 Nicholas Shanks <webkit@nickshanks.com>
  * Copyright (C) 2011 Sencha, Inc. All rights reserved.
  * Copyright (C) 2015 Google Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
@@ skipping 38 matching lines @@
 #include "core/css/CSSValuePool.h"
 #include "core/layout/LayoutBlock.h"
 #include "core/layout/LayoutBox.h"
 #include "core/layout/LayoutGrid.h"
 #include "core/layout/LayoutObject.h"
 #include "core/style/ComputedStyle.h"
 #include "core/style/ContentData.h"
 #include "core/style/PathStyleMotionPath.h"
 #include "core/style/QuotesData.h"
 #include "core/style/ShadowList.h"
+#include "core/style/StyleVariableData.h"
 #include "core/svg/SVGPathUtilities.h"
 #include "platform/LengthFunctions.h"
 
 namespace blink {
 
 inline static bool isFlexOrGrid(const ComputedStyle* style)
 {
     return style && style->isDisplayFlexibleOrGridBox();
 }
 
@@ skipping 2665 matching lines @@
     case CSSPropertyAll:
         return nullptr;
     default:
         break;
     }
     ASSERT_NOT_REACHED();
     return nullptr;
 }
 
 }