blink: Cleanup core class forward declarations

third_party/WebKit/Source/core/layout/svg/SVGLayoutSupport.h

 /**
  * Copyright (C) 2007 Rob Buis <buis@kde.org>
  * Copyright (C) 2007 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2007 Eric Seidel <eric@webkit.org>
  * Copyright (C) 2009 Google, Inc.  All rights reserved.
  * Copyright (C) Research In Motion Limited 2010. 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
@@ skipping 17 matching lines @@
 #include "core/style/SVGComputedStyleDefs.h"
 #include "platform/graphics/DashArray.h"
 #include "platform/transforms/AffineTransform.h"
 #include "wtf/Allocator.h"
 
 namespace blink {
 
 class AffineTransform;
 class FloatPoint;
 class FloatRect;
-class PaintInvalidationState;
 class LayoutRect;
 class LayoutGeometryMap;
 class LayoutBoxModelObject;
 class LayoutObject;
 class ComputedStyle;
 class LayoutSVGRoot;
 class SVGLengthContext;
 class StrokeData;
 class TransformState;
 
@@ skipping 173 matching lines @@
     if (child->hasNonIsolatedBlendingDescendants() &&
         !willIsolateBlendingDescendantsForObject(child))
       return true;
   }
   return false;
 }
 
 }  // namespace blink
 
 #endif  // SVGLayoutSupport_h