Common up SVG transform "change detection" (classification)

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

 /*
  * Copyright (C) 2004, 2005, 2007 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005, 2007 Rob Buis <buis@kde.org>
  * Copyright (C) 2009 Google, Inc.
  * Copyright (C) 2009 Apple Inc. 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
  * version 2 of the License, or (at your option) any later version.
@@ skipping 32 matching lines @@
 
     const char* name() const override { return "LayoutSVGViewportContainer"; }
 
 private:
     bool isOfType(LayoutObjectType type) const override { return type == LayoutObjectSVGViewportContainer || LayoutSVGContainer::isOfType(type); }
 
     AffineTransform viewportTransform() const;
     const AffineTransform& localToSVGParentTransform() const override { return m_localToParentTransform; }
 
     void calcViewport() override;
-    TransformChange calculateLocalTransform() override;
+    SVGTransformChange calculateLocalTransform() override;
 
     bool pointIsInsideViewportClip(const FloatPoint& pointInParent) override;
 
     FloatRect m_viewport;
     mutable AffineTransform m_localToParentTransform;
     bool m_isLayoutSizeChanged : 1;
     bool m_needsTransformUpdate : 1;
 };
 
 DEFINE_LAYOUT_OBJECT_TYPE_CASTS(LayoutSVGViewportContainer, isSVGViewportContainer());
 
 } // namespace blink
 
 #endif // LayoutSVGViewportContainer_h