Revert of Tracking 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 cb2c1e4469c24fdcba4c08317f515b85e97fff17..8e2379b87dbb9f46de569918391676782f842009 100644
--- a/third_party/WebKit/Source/core/dom/Document.h
+++ b/third_party/WebKit/Source/core/dom/Document.h
@@ -471,6 +471,11 @@
   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();
@@ -1230,6 +1235,10 @@
 
   DECLARE_VIRTUAL_TRACE_WRAPPERS();
 
+  bool hasSVGFilterElementsRequiringLayerUpdate() const {
+    return m_layerUpdateSVGFilterElements.size();
+  }
+
   AtomicString convertLocalName(const AtomicString&);
 
   void platformColorsChanged();
@@ -1355,6 +1364,8 @@
   bool needsFullLayoutTreeUpdate() const;
 
   void inheritHtmlAndBodyElementStyles(StyleRecalcChange);
+
+  bool dirtyElementsForLayerUpdate();
 
   void updateUseShadowTreesIfNeeded();
   void evaluateMediaQueryListIfNeeded();
@@ -1636,6 +1647,7 @@
   TaskRunnerTimer<Document> m_didAssociateFormControlsTimer;
 
   HeapHashSet<Member<SVGUseElement>> m_useElementsNeedingUpdate;
+  HeapHashSet<Member<Element>> m_layerUpdateSVGFilterElements;
 
   DOMTimerCoordinator m_timers;