Reduce how often LayoutSVGShape::updateShapeFromElement is called

Source/core/svg/SVGElement.h

 /*
  * Copyright (C) 2004, 2005, 2006, 2008 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005, 2006 Rob Buis <buis@kde.org>
  * Copyright (C) 2009, 2014 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 126 matching lines @@
     MutableStylePropertySet* ensureAnimatedSMILStyleProperties();
     void setUseOverrideComputedStyle(bool);
 
     virtual bool haveLoadedRequiredResources();
 
     virtual bool addEventListener(const AtomicString& eventType, PassRefPtr<EventListener>, bool useCapture = false) override final;
     virtual bool removeEventListener(const AtomicString& eventType, PassRefPtr<EventListener>, bool useCapture = false) override final;
 
     void invalidateRelativeLengthClients(SubtreeLayoutScope* = 0);
 
+    virtual bool selfHasRelativeLengths() const { return false; }
+
     void addToPropertyMap(PassRefPtrWillBeRawPtr<SVGAnimatedPropertyBase>);
 
     SVGAnimatedString* className() { return m_className.get(); }
 
     bool inUseShadowTree() const;
 
     SVGElementSet* setOfIncomingReferences() const;
     void addReferenceTo(SVGElement*);
     void rebuildAllIncomingReferences();
     void removeAllIncomingReferences();
@@ skipping 41 matching lines @@
 
     virtual InsertionNotificationRequest insertedInto(ContainerNode*) override;
     virtual void removedFrom(ContainerNode*) override;
     virtual void childrenChanged(const ChildrenChange&) override;
 
     static CSSPropertyID cssPropertyIdForSVGAttributeName(const QualifiedName&);
     void updateRelativeLengthsInformation() { updateRelativeLengthsInformation(selfHasRelativeLengths(), this); }
     void updateRelativeLengthsInformation(bool hasRelativeLengths, SVGElement*);
     static void markForLayoutAndParentResourceInvalidation(LayoutObject*);
 
-    virtual bool selfHasRelativeLengths() const { return false; }
-
     SVGElementRareData* ensureSVGRareData();
     inline bool hasSVGRareData() const { return m_SVGRareData; }
     inline SVGElementRareData* svgRareData() const
     {
         ASSERT(m_SVGRareData);
         return m_SVGRareData.get();
     }
 
     // SVGFitToViewBox::parseAttribute uses reportAttributeParsingError.
     friend class SVGFitToViewBox;
@@ skipping 55 matching lines @@
     template<typename T> inline bool is##thisType(const PassRefPtrWillBeRawPtr<T>& node) { return is##thisType(node.get()); } \
     template<typename T> inline bool is##thisType(const RefPtrWillBeMember<T>& node) { return is##thisType(node.get()); } \
     template <> inline bool isElementOfType<const thisType>(const SVGElement& element) { return is##thisType(element); } \
     DEFINE_ELEMENT_TYPE_CASTS_WITH_FUNCTION(thisType)
 
 } // namespace blink
 
 #include "core/SVGElementTypeHelpers.h"
 
 #endif // SVGElement_h