Adding the 'filter' context attribute to 2D canvas

Source/core/layout/svg/ReferenceFilterBuilder.h

Index: Source/core/layout/svg/ReferenceFilterBuilder.h
diff --git a/Source/core/layout/svg/ReferenceFilterBuilder.h b/Source/core/layout/svg/ReferenceFilterBuilder.h
index 5d26022398ec8eb338b02bfc747ad5fcfa0a1489..93f3200e90bc0550f03bdadf0226d9a0697dd356 100644
--- a/Source/core/layout/svg/ReferenceFilterBuilder.h
+++ b/Source/core/layout/svg/ReferenceFilterBuilder.h
@@ -38,11 +38,11 @@
 
 namespace blink {
 
+class Element;
 class Filter;
 class FilterEffect;
 class FilterOperation;
 class ReferenceFilterOperation;
-class LayoutObject;
 
 class ReferenceFilterBuilder {
 public:
@@ -50,7 +50,7 @@ public:
     static void setDocumentResourceReference(const FilterOperation*, PassOwnPtr<DocumentResourceReference>);
     static void clearDocumentResourceReference(const FilterOperation*);
 
-    static PassRefPtrWillBeRawPtr<FilterEffect> build(Filter*, LayoutObject&, FilterEffect*, const ReferenceFilterOperation&);
+    static PassRefPtrWillBeRawPtr<FilterEffect> build(Filter*, Element*, FilterEffect*, const ReferenceFilterOperation&);
 
 private:
     static HashMap<const FilterOperation*, OwnPtr<DocumentResourceReference>>* documentResourceReferences;