Revert of Tracking filter mutation via SVGElementProxy

third_party/WebKit/Source/core/layout/svg/LayoutSVGResourceContainer.h

Index: third_party/WebKit/Source/core/layout/svg/LayoutSVGResourceContainer.h
diff --git a/third_party/WebKit/Source/core/layout/svg/LayoutSVGResourceContainer.h b/third_party/WebKit/Source/core/layout/svg/LayoutSVGResourceContainer.h
index dc6926022eb7c78c7c2f04a3a615a37a273cd43c..6419c89be7e8687bdf727ac791e58f3d33b611d1 100644
--- a/third_party/WebKit/Source/core/layout/svg/LayoutSVGResourceContainer.h
+++ b/third_party/WebKit/Source/core/layout/svg/LayoutSVGResourceContainer.h
@@ -22,10 +22,10 @@
 
 #include "core/layout/svg/LayoutSVGHiddenContainer.h"
 #include "core/svg/SVGDocumentExtensions.h"
+#include "core/svg/SVGResourceClient.h"
+#include "platform/heap/Handle.h"
 
 namespace blink {
-
-class SVGElementProxySet;
 
 enum LayoutSVGResourceType {
   MaskerResourceType,
@@ -63,6 +63,8 @@
   }
 
   void idChanged();
+  void addResourceClient(SVGResourceClient*);
+  void removeResourceClient(SVGResourceClient*);
 
   void invalidateCacheAndMarkForLayout(SubtreeLayoutScope* = nullptr);
 
@@ -84,10 +86,8 @@
   // Used from the invalidateClient/invalidateClients methods from classes,
   // inheriting from us.
   void markAllClientsForInvalidation(InvalidationMode);
+  void markAllResourceClientsForInvalidation();
   void markClientForInvalidation(LayoutObject*, InvalidationMode);
-
-  void notifyContentChanged();
-  virtual SVGElementProxySet* elementProxySet() { return nullptr; }
 
   void willBeDestroyed() override;
 
@@ -111,6 +111,7 @@
   // 22 padding bits available
 
   HashSet<LayoutObject*> m_clients;
+  PersistentHeapHashSet<WeakMember<SVGResourceClient>> m_resourceClients;
 };
 
 inline LayoutSVGResourceContainer* getLayoutSVGResourceContainerById(