Tracking filter mutation via SVGElementProxy

third_party/WebKit/Source/modules/canvas2d/CanvasRenderingContext2D.h

Index: third_party/WebKit/Source/modules/canvas2d/CanvasRenderingContext2D.h
diff --git a/third_party/WebKit/Source/modules/canvas2d/CanvasRenderingContext2D.h b/third_party/WebKit/Source/modules/canvas2d/CanvasRenderingContext2D.h
index b5680fc25396643242adfb74f9ac1ed8cfb741fe..fc8c1953ae17a406f3a48adeaf58229aa452f107 100644
--- a/third_party/WebKit/Source/modules/canvas2d/CanvasRenderingContext2D.h
+++ b/third_party/WebKit/Source/modules/canvas2d/CanvasRenderingContext2D.h
@@ -31,6 +31,7 @@
 #include "core/html/canvas/CanvasContextCreationAttributes.h"
 #include "core/html/canvas/CanvasRenderingContext.h"
 #include "core/html/canvas/CanvasRenderingContextFactory.h"
+#include "core/style/FilterOperations.h"
 #include "core/svg/SVGResourceClient.h"
 #include "modules/ModulesExport.h"
 #include "modules/canvas2d/BaseRenderingContext2D.h"
@@ -154,7 +155,11 @@ class MODULES_EXPORT CanvasRenderingContext2D final
   String getIdFromControl(const Element*) override;
 
   // SVGResourceClient implementation
-  void filterNeedsInvalidation() override;
+  void resourceContentChanged(SVGElementProxy*) override;
+  void resourceReferenceChanged(SVGElementProxy*) override;
+
+  void updateFilterReferences(const FilterOperations&);
+  void clearFilterReferences();
 
   // BaseRenderingContext2D implementation
   bool originClean() const final;
@@ -250,6 +255,7 @@ class MODULES_EXPORT CanvasRenderingContext2D final
   Timer<CanvasRenderingContext2D> m_dispatchContextRestoredEventTimer;
   Timer<CanvasRenderingContext2D> m_tryRestoreContextEventTimer;
 
+  FilterOperations m_filterOperations;
   HashMap<String, Font> m_fontsResolvedUsingCurrentStyle;
   bool m_pruneLocalFontCacheScheduled;
   ListHashSet<String> m_fontLRUList;