Reland of "Tracking reference filter mutation via SVGElementProxy"

third_party/WebKit/Source/core/layout/svg/LayoutSVGResourceFilter.cpp

 /*
  * Copyright (C) 2004, 2005, 2006, 2007 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005 Rob Buis <buis@kde.org>
  * Copyright (C) 2005 Eric Seidel <eric@webkit.org>
  * Copyright (C) 2009 Dirk Schulze <krit@webkit.org>
  * Copyright (C) Research In Motion Limited 2010. 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
@@ skipping 42 matching lines @@
 void LayoutSVGResourceFilter::willBeDestroyed() {
   disposeFilterMap();
   LayoutSVGResourceContainer::willBeDestroyed();
 }
 
 bool LayoutSVGResourceFilter::isChildAllowed(LayoutObject* child,
                                              const ComputedStyle&) const {
   return child->isSVGResourceFilterPrimitive();
 }
 
+SVGElementProxySet* LayoutSVGResourceFilter::elementProxySet() {
+  return &toSVGFilterElement(*element()).elementProxySet();
+}
+
 void LayoutSVGResourceFilter::removeAllClientsFromCache(
     bool markForInvalidation) {
   // LayoutSVGResourceFilter::removeClientFromCache will be called for
   // all clients through markAllClientsForInvalidation so no explicit
   // display item invalidation is needed here.
   disposeFilterMap();
   markAllClientsForInvalidation(markForInvalidation
                                     ? LayoutAndBoundariesInvalidation
                                     : ParentOnlyInvalidation);
 }
@@ skipping 56 matching lines @@
       continue;
     // Since all effects shares the same attribute value, all
     // or none of them will be changed.
     if (!primitive->setFilterEffectAttribute(effect, attribute))
       return;
     nodeMap->invalidateDependentEffects(effect);
 
     // Issue paint invalidations for the image on the screen.
     markClientForInvalidation(filter.key, PaintInvalidation);
   }
-  markAllResourceClientsForInvalidation();
+  notifyContentChanged();
 }
 
 }  // namespace blink