Get rid of RenderLayer tracking in RenderSVGResourceContainer.

Source/core/rendering/svg/RenderSVGResourceContainer.h

Index: Source/core/rendering/svg/RenderSVGResourceContainer.h
diff --git a/Source/core/rendering/svg/RenderSVGResourceContainer.h b/Source/core/rendering/svg/RenderSVGResourceContainer.h
index 753e50bc04aec8498fc1753685e61595360b843e..a46a83e641d7e7dcefdac229772ce1ad9c25a959 100644
--- a/Source/core/rendering/svg/RenderSVGResourceContainer.h
+++ b/Source/core/rendering/svg/RenderSVGResourceContainer.h
@@ -25,8 +25,6 @@
 
 namespace blink {
 
-class RenderLayer;
-
 class RenderSVGResourceContainer : public RenderSVGHiddenContainer,
                                    public RenderSVGResource {
 public:
@@ -41,9 +39,8 @@ public:
     static AffineTransform transformOnNonScalingStroke(RenderObject*, const AffineTransform& resourceTransform);
 
     void idChanged();
-    void addClientRenderLayer(Node*);
-    void addClientRenderLayer(RenderLayer*);
-    void removeClientRenderLayer(RenderLayer*);
+    void addClient(RenderObject*);
+    void removeClient(RenderObject*);
 
     void invalidateCacheAndMarkForLayout(SubtreeLayoutScope* = 0);
 
@@ -58,7 +55,6 @@ protected:
 
     // Used from the invalidateClient/invalidateClients methods from classes, inheriting from us.
     void markAllClientsForInvalidation(InvalidationMode);
-    void markAllClientLayersForInvalidation();
     void markClientForInvalidation(RenderObject*, InvalidationMode);
 
     void clearInvalidationMask() { m_invalidationMask = 0; }
@@ -69,8 +65,6 @@ protected:
 
 private:
     friend class SVGResourcesCache;
-    void addClient(RenderObject*);
-    void removeClient(RenderObject*);
 
     virtual void willBeDestroyed() OVERRIDE FINAL;
     void registerResource();
@@ -84,7 +78,6 @@ private:
     // 22 padding bits available
 
     HashSet<RenderObject*> m_clients;
-    HashSet<RenderLayer*> m_clientLayers;
 };
 
 inline RenderSVGResourceContainer* getRenderSVGResourceContainerById(TreeScope& treeScope, const AtomicString& id)