Move InvalidationGuard/InstanceUpdateBlocker out of SVGElementInstance

Source/core/svg/SVGStopElement.cpp

 /*
  * Copyright (C) 2004, 2005, 2007, 2008 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005, 2006, 2007 Rob Buis <buis@kde.org>
  *
  * 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.
  *
  * This library is distributed in the hope that it will be useful,
@@ skipping 56 matching lines @@
     reportAttributeParsingError(parseError, name, value);
 }
 
 void SVGStopElement::svgAttributeChanged(const QualifiedName& attrName)
 {
     if (!isSupportedAttribute(attrName)) {
         SVGElement::svgAttributeChanged(attrName);
         return;
     }
 
-    SVGElementInstance::InvalidationGuard invalidationGuard(this);
+    SVGElement::InvalidationGuard invalidationGuard(this);
 
     if (!renderer())
         return;
 
     if (attrName == SVGNames::offsetAttr) {
         RenderSVGResource::markForLayoutAndParentResourceInvalidation(renderer());
         return;
     }
 
     ASSERT_NOT_REACHED();
@@ skipping 16 matching lines @@
     // which the renderer or style is null. This entire class is scheduled for removal (Bug WK 86941)
     // and we will tolerate this null check until then.
     if (!style || !style->svgStyle())
         return Color(Color::transparent); // Transparent black.
 
     const SVGRenderStyle* svgStyle = style->svgStyle();
     return svgStyle->stopColor().combineWithAlpha(svgStyle->stopOpacity());
 }
 
 }