Update documentation and cleanup impls for localToSVGParentTransform()

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

 /*
  * Copyright (C) 2006 Alexander Kellett <lypanov@kde.org>
  * Copyright (C) 2006, 2009 Apple Inc. All rights reserved.
  * Copyright (C) 2007 Rob Buis <buis@kde.org>
  * Copyright (C) 2009 Google, Inc.
  * Copyright (C) 2010 Patrick Gansterer <paroga@paroga.com>
  *
  * 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 26 matching lines @@
   ~LayoutSVGImage() override;
 
   void setNeedsBoundariesUpdate() override { m_needsBoundariesUpdate = true; }
   void setNeedsTransformUpdate() override { m_needsTransformUpdate = true; }
 
   LayoutImageResource* imageResource() { return m_imageResource.get(); }
   const LayoutImageResource* imageResource() const {
     return m_imageResource.get();
   }
 
-  const AffineTransform& localToSVGParentTransform() const override {
-    return m_localTransform;
-  }
-
   FloatRect objectBoundingBox() const override { return m_objectBoundingBox; }
   bool isOfType(LayoutObjectType type) const override {
     return type == LayoutObjectSVGImage || LayoutSVGModelObject::isOfType(type);
   }
 
   const char* name() const override { return "LayoutSVGImage"; }
 
  protected:
   void willBeDestroyed() override;
 
@@ skipping 26 matching lines @@
   AffineTransform m_localTransform;
   FloatRect m_objectBoundingBox;
   Persistent<LayoutImageResource> m_imageResource;
 };
 
 DEFINE_LAYOUT_OBJECT_TYPE_CASTS(LayoutSVGImage, isSVGImage());
 
 }  // namespace blink
 
 #endif  // LayoutSVGImage_h