Clean up forward declarations in Source/core/rendering

Source/core/rendering/PaintInvalidationState.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef PaintInvalidationState_h
 #define PaintInvalidationState_h
 
 #include "platform/geometry/LayoutRect.h"
 #include "wtf/Noncopyable.h"
 
 namespace blink {
 
-class RenderBox;
-class RenderInline;
 class RenderLayerModelObject;
 class RenderObject;
 class RenderView;
-class RenderSVGModelObject;
 
 class PaintInvalidationState {
     WTF_MAKE_NONCOPYABLE(PaintInvalidationState);
 public:
     PaintInvalidationState(const PaintInvalidationState& next, RenderLayerModelObject& renderer, const RenderLayerModelObject& paintInvalidationContainer);
 
     explicit PaintInvalidationState(const RenderView&);
 
     const LayoutRect& clipRect() const { return m_clipRect; }
     const LayoutSize& paintOffset() const { return m_paintOffset; }
@@ skipping 23 matching lines @@
 
     // x/y offset from paint invalidation container. Includes relative positioning and scroll offsets.
     LayoutSize m_paintOffset;
 
     const RenderLayerModelObject& m_paintInvalidationContainer;
 };
 
 } // namespace blink
 
 #endif // PaintInvalidationState_h