Strength-reduce the "scale-factor changed" condition in LayoutSVGRoot

third_party/WebKit/Source/core/layout/svg/LayoutSVGRoot.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.  All rights reserved.
  * 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 10 matching lines @@
  */
 
 #ifndef LayoutSVGRoot_h
 #define LayoutSVGRoot_h
 
 #include "core/layout/LayoutReplaced.h"
 
 namespace blink {
 
 class SVGElement;
+enum class SVGTransformChange;
 
 class CORE_EXPORT LayoutSVGRoot final : public LayoutReplaced {
  public:
   explicit LayoutSVGRoot(SVGElement*);
   ~LayoutSVGRoot() override;
 
   bool isEmbeddedThroughSVGImage() const;
   bool isEmbeddedThroughFrameContainingSVGDocument() const;
 
   void computeIntrinsicSizingInfo(IntrinsicSizingInfo&) const override;
@@ skipping 108 matching lines @@
   const LayoutObject* pushMappingToContainer(
       const LayoutBoxModelObject* ancestorToStopAt,
       LayoutGeometryMap&) const override;
 
   bool canBeSelectionLeaf() const override { return false; }
   bool canHaveChildren() const override { return true; }
 
   void descendantIsolationRequirementsChanged(DescendantIsolationState) final;
 
   void updateCachedBoundaries();
-  void buildLocalToBorderBoxTransform();
+  SVGTransformChange buildLocalToBorderBoxTransform();
 
   PositionWithAffinity positionForPoint(const LayoutPoint&) final;
 
   LayoutObjectChildList m_children;
   IntSize m_containerSize;
   FloatRect m_objectBoundingBox;
   bool m_objectBoundingBoxValid;
   FloatRect m_strokeBoundingBox;
   FloatRect m_visualRectInLocalSVGCoordinates;
   AffineTransform m_localToBorderBoxTransform;
   bool m_isLayoutSizeChanged : 1;
   bool m_didScreenScaleFactorChange : 1;
   bool m_needsBoundariesOrTransformUpdate : 1;
   bool m_hasBoxDecorationBackground : 1;
   mutable bool m_hasNonIsolatedBlendingDescendants : 1;
   mutable bool m_hasNonIsolatedBlendingDescendantsDirty : 1;
 };
 
 DEFINE_LAYOUT_OBJECT_TYPE_CASTS(LayoutSVGRoot, isSVGRoot());
 
 }  // namespace blink
 
 #endif  // LayoutSVGRoot_h