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 9cb95e271df9b3894133e02a735e2d35113473b2..4eee4e7c558cbc7313711d1304a9ebb8545a80de 100644
--- a/third_party/WebKit/Source/core/layout/svg/LayoutSVGResourceContainer.h
+++ b/third_party/WebKit/Source/core/layout/svg/LayoutSVGResourceContainer.h
@@ -22,11 +22,11 @@
 
 #include "core/layout/svg/LayoutSVGHiddenContainer.h"
 #include "core/svg/SVGDocumentExtensions.h"
-#include "core/svg/SVGResourceClient.h"
-#include "platform/heap/Handle.h"
 
 namespace blink {
 
+class SVGElementProxyTracker;
+
 enum LayoutSVGResourceType {
   MaskerResourceType,
   MarkerResourceType,
@@ -37,8 +37,6 @@ enum LayoutSVGResourceType {
   ClipperResourceType
 };
 
-class PaintLayer;
-
 class LayoutSVGResourceContainer : public LayoutSVGHiddenContainer {
  public:
   explicit LayoutSVGResourceContainer(SVGElement*);
@@ -65,8 +63,6 @@ class LayoutSVGResourceContainer : public LayoutSVGHiddenContainer {
   }
 
   void idChanged();
-  void addResourceClient(SVGResourceClient*);
-  void removeResourceClient(SVGResourceClient*);
 
   void invalidateCacheAndMarkForLayout(SubtreeLayoutScope* = nullptr);
 
@@ -88,9 +84,12 @@ class LayoutSVGResourceContainer : public LayoutSVGHiddenContainer {
   // Used from the invalidateClient/invalidateClients methods from classes,
   // inheriting from us.
   void markAllClientsForInvalidation(InvalidationMode);
-  void markAllResourceClientsForInvalidation();
   void markClientForInvalidation(LayoutObject*, InvalidationMode);
 
+  void invalidateProxyClients(InvalidationMode);

[pdr., 2016/10/20 03:11:05]

Is InvalidationMode needed (yet)?

[fs, 2016/10/20 11:28:00]

No. Dropped (for now.)

+  void invalidateProxies();
+  virtual SVGElementProxyTracker* elementProxyTracker() { return nullptr; }
+
   void willBeDestroyed() override;
 
   bool m_isInLayout;
@@ -113,7 +112,6 @@ class LayoutSVGResourceContainer : public LayoutSVGHiddenContainer {
   // 22 padding bits available
 
   HashSet<LayoutObject*> m_clients;
-  PersistentHeapHashSet<WeakMember<SVGResourceClient>> m_resourceClients;
 };
 
 inline LayoutSVGResourceContainer* getLayoutSVGResourceContainerById(