Make supportsMarkers non virtual

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 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 37 matching lines @@
 void mapAttributeToCSSProperty(HashMap<StringImpl*, CSSPropertyID>* propertyNameToIdMap, const QualifiedName& attrName);
 
 class SVGElement : public Element {
 public:
     virtual ~SVGElement();
 
     bool isOutermostSVGSVGElement() const;
 
     virtual String title() const OVERRIDE;
     bool hasRelativeLengths() const { return !m_elementsWithRelativeLengths.isEmpty(); }
-    virtual bool supportsMarkers() const { return false; }
+    bool supportsMarkers() const;

[f(malita), 2014/03/19 14:58:55]

This is now just a tag check and the only clients are
RenderSVGShape::shouldGenerateMarkerPositions() and
SVGResources::buildResources(). I don't think we need to expose it in SVGElement
anymore, it can be a SVGRenderSupport helper.

     PassRefPtrWillBeRawPtr<CSSValue> getPresentationAttribute(const AtomicString& name);
     static bool isAnimatableCSSProperty(const QualifiedName&);
     enum CTMScope {
         NearestViewportScope, // Used by SVGGraphicsElement::getCTM()
         ScreenScope, // Used by SVGGraphicsElement::getScreenCTM()
         AncestorScope // Used by SVGSVGElement::get{Enclosure|Intersection}List()
     };
     virtual AffineTransform localCoordinateSpaceTransform(CTMScope) const;
     virtual bool needsPendingResourceHandling() const { return true; }
 
@@ skipping 157 matching lines @@
         return DefaultHash<QualifiedName>::Hash::hash(key);
     }
     static bool equal(const QualifiedName& a, const QualifiedName& b) { return a.matches(b); }
 };
 
 DEFINE_ELEMENT_TYPE_CASTS(SVGElement, isSVGElement());
 
 }
 
 #endif