Reland of "Tracking reference filter mutation via SVGElementProxy"

third_party/WebKit/Source/core/dom/Document.h

Index: third_party/WebKit/Source/core/dom/Document.h
diff --git a/third_party/WebKit/Source/core/dom/Document.h b/third_party/WebKit/Source/core/dom/Document.h
index f5397a41c0991ef5df0f81d78e57cf38b0bf6c4d..1f6e73ad1041105173d33a0cdc08b3a7f7a0f57d 100644
--- a/third_party/WebKit/Source/core/dom/Document.h
+++ b/third_party/WebKit/Source/core/dom/Document.h
@@ -471,11 +471,6 @@ class CORE_EXPORT Document : public ContainerNode,
   void scheduleUseShadowTreeUpdate(SVGUseElement&);
   void unscheduleUseShadowTreeUpdate(SVGUseElement&);
 
-  // FIXME: SVG filters should change to store the filter on the ComputedStyle
-  // instead of the LayoutObject so we can get rid of this hack.
-  void scheduleSVGFilterLayerUpdateHack(Element&);
-  void unscheduleSVGFilterLayerUpdateHack(Element&);
-
   void evaluateMediaQueryList();
 
   FormController& formController();
@@ -1233,10 +1228,6 @@ class CORE_EXPORT Document : public ContainerNode,
 
   DECLARE_VIRTUAL_TRACE_WRAPPERS();
 
-  bool hasSVGFilterElementsRequiringLayerUpdate() const {
-    return m_layerUpdateSVGFilterElements.size();
-  }
-
   AtomicString convertLocalName(const AtomicString&);
 
   void platformColorsChanged();
@@ -1363,8 +1354,6 @@ class CORE_EXPORT Document : public ContainerNode,
 
   void inheritHtmlAndBodyElementStyles(StyleRecalcChange);
 
-  bool dirtyElementsForLayerUpdate();
-
   void updateUseShadowTreesIfNeeded();
   void evaluateMediaQueryListIfNeeded();
 
@@ -1645,7 +1634,6 @@ class CORE_EXPORT Document : public ContainerNode,
   TaskRunnerTimer<Document> m_didAssociateFormControlsTimer;
 
   HeapHashSet<Member<SVGUseElement>> m_useElementsNeedingUpdate;
-  HeapHashSet<Member<Element>> m_layerUpdateSVGFilterElements;
 
   DOMTimerCoordinator m_timers;