Revert of Tracking filter mutation via SVGElementProxy

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

Index: third_party/WebKit/Source/core/layout/svg/LayoutSVGResourceFilter.cpp
diff --git a/third_party/WebKit/Source/core/layout/svg/LayoutSVGResourceFilter.cpp b/third_party/WebKit/Source/core/layout/svg/LayoutSVGResourceFilter.cpp
index 6f9babbf90fd64e9c1e7795c1e52bc936965048c..68359ae550dde9fa64067eba0034db481e5edbd8 100644
--- a/third_party/WebKit/Source/core/layout/svg/LayoutSVGResourceFilter.cpp
+++ b/third_party/WebKit/Source/core/layout/svg/LayoutSVGResourceFilter.cpp
@@ -58,10 +58,6 @@
 bool LayoutSVGResourceFilter::isChildAllowed(LayoutObject* child,
                                              const ComputedStyle&) const {
   return child->isSVGResourceFilterPrimitive();
-}
-
-SVGElementProxySet* LayoutSVGResourceFilter::elementProxySet() {
-  return &toSVGFilterElement(*element()).elementProxySet();
 }
 
 void LayoutSVGResourceFilter::removeAllClientsFromCache(
@@ -140,7 +136,7 @@
     // Issue paint invalidations for the image on the screen.
     markClientForInvalidation(filter.key, PaintInvalidation);
   }
-  notifyContentChanged();
+  markAllResourceClientsForInvalidation();
 }
 
 }  // namespace blink