Don't force layout of descendants of SVG containers needing self-layout

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 29 matching lines @@
     void computeIntrinsicSizingInfo(IntrinsicSizingInfo&) const override;
 
     // If you have a LayoutSVGRoot, use firstChild or lastChild instead.
     void slowFirstChild() const = delete;
     void slowLastChild() const = delete;
 
     LayoutObject* firstChild() const { ASSERT(children() == virtualChildren()); return children()->firstChild(); }
     LayoutObject* lastChild() const { ASSERT(children() == virtualChildren()); return children()->lastChild(); }
 
     bool isLayoutSizeChanged() const { return m_isLayoutSizeChanged; }
+    bool didScreenScaleFactorChange() const { return m_didScreenScaleFactorChange; }
     void setNeedsBoundariesUpdate() override { m_needsBoundariesOrTransformUpdate = true; }
     void setNeedsTransformUpdate() override { m_needsBoundariesOrTransformUpdate = true; }
 
     IntSize containerSize() const { return m_containerSize; }
     void setContainerSize(const IntSize& containerSize)
     {
         // SVGImage::draw() does a view layout prior to painting,
         // and we need that layout to know of the new size otherwise
         // the layout may be incorrectly using the old size.
         if (m_containerSize != containerSize)
@@ skipping 57 matching lines @@
 
     LayoutObjectChildList m_children;
     IntSize m_containerSize;
     FloatRect m_objectBoundingBox;
     bool m_objectBoundingBoxValid;
     FloatRect m_strokeBoundingBox;
     FloatRect m_paintInvalidationBoundingBox;
     mutable AffineTransform m_localToParentTransform;
     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