Reland of "Tracking reference filter mutation via SVGElementProxy"

third_party/WebKit/Source/core/paint/PaintLayer.h

Index: third_party/WebKit/Source/core/paint/PaintLayer.h
diff --git a/third_party/WebKit/Source/core/paint/PaintLayer.h b/third_party/WebKit/Source/core/paint/PaintLayer.h
index e29a5c04b279a7847b9768250bd718309e509b33..edda077fb96ec4880e7e43775f5cbeca25063792 100644
--- a/third_party/WebKit/Source/core/paint/PaintLayer.h
+++ b/third_party/WebKit/Source/core/paint/PaintLayer.h
@@ -67,6 +67,7 @@ namespace blink {
 class CompositedLayerMapping;
 class CompositorFilterOperations;
 class ComputedStyle;
+class FilterEffect;
 class FilterOperations;
 class HitTestResult;
 class HitTestingTransformState;
@@ -481,8 +482,6 @@ class CORE_EXPORT PaintLayer : public DisplayItemClient {
            layoutObject()->style()->preserves3D();
   }
 
-  void filterNeedsPaintInvalidation();
-
   // Returns |true| if any property that renders using filter operations is
   // used (including, but not limited to, 'filter' and 'box-reflect').
   bool hasFilterInducingProperty() const {
@@ -599,6 +598,7 @@ class CORE_EXPORT PaintLayer : public DisplayItemClient {
     return m_rareData ? m_rareData->filterInfo.get() : nullptr;
   }
   PaintLayerFilterInfo& ensureFilterInfo();
+  void removeFilterInfo();
 
   void updateFilters(const ComputedStyle* oldStyle,
                      const ComputedStyle& newStyle);
@@ -816,8 +816,6 @@ class CORE_EXPORT PaintLayer : public DisplayItemClient {
 
   void updateDescendantDependentFlags();
 
-  void updateOrRemoveFilterEffect();
-
   void updateSelfPaintingLayer();
   // This is O(depth) so avoid calling this in loops. Instead use optimizations
   // like those in PaintInvalidationState.
@@ -1070,7 +1068,6 @@ class CORE_EXPORT PaintLayer : public DisplayItemClient {
   void updateStackingNode();
 
   FilterOperations addReflectionToFilterOperations(const ComputedStyle&) const;
-  FilterEffect* updateFilterEffect() const;
 
   // FIXME: We could lazily allocate our ScrollableArea based on style
   // properties ('overflow', ...) but for now, we are always allocating it for
@@ -1087,8 +1084,6 @@ class CORE_EXPORT PaintLayer : public DisplayItemClient {
 
   void removeAncestorOverflowLayer(const PaintLayer* removedLayer);
 
-  void updateOrRemoveFilterClients();
-
   void updatePaginationRecursive(bool needsPaginationUpdate = false);
   void clearPaginationRecursive();