Reduce forward declarations in core/rendering

Source/core/rendering/RenderGeometryMap.h

 /*
  * Copyright (C) 2012 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 20 matching lines @@
 #include "platform/geometry/FloatQuad.h"
 #include "platform/geometry/IntSize.h"
 #include "platform/geometry/LayoutSize.h"
 #include "platform/transforms/TransformationMatrix.h"
 #include "wtf/OwnPtr.h"
 
 namespace WebCore {
 
 class RenderLayer;
 class RenderLayerModelObject;
-class RenderView;
 class TransformState;
 
 // Stores data about how to map from one renderer to its container.
 struct RenderGeometryMapStep {
     RenderGeometryMapStep(const RenderGeometryMapStep& o)
         : m_renderer(o.m_renderer)
         , m_offset(o.m_offset)
         , m_offsetForFixedPosition(o.m_offsetForFixedPosition)
         , m_accumulatingTransform(o.m_accumulatingTransform)
         , m_isNonUniform(o.m_isNonUniform)
@@ skipping 85 matching lines @@
     RenderGeometryMapSteps m_mapping;
     LayoutSize m_accumulatedOffset;
     MapCoordinatesFlags m_mapCoordinatesFlags;
 };
 
 } // namespace WebCore
 
 WTF_ALLOW_MOVE_INIT_AND_COMPARE_WITH_MEM_FUNCTIONS(WebCore::RenderGeometryMapStep);
 
 #endif // RenderGeometryMap_h