Adding the 'filter' context attribute to 2D canvas

Source/core/layout/svg/ReferenceFilterBuilder.cpp

Index: Source/core/layout/svg/ReferenceFilterBuilder.cpp
diff --git a/Source/core/layout/svg/ReferenceFilterBuilder.cpp b/Source/core/layout/svg/ReferenceFilterBuilder.cpp
index 754c52693e922788605df649173d264596a84c83..c0136065f5807a005d38195331f223781b44453c 100644
--- a/Source/core/layout/svg/ReferenceFilterBuilder.cpp
+++ b/Source/core/layout/svg/ReferenceFilterBuilder.cpp
@@ -87,9 +87,9 @@ static EColorInterpolation colorInterpolationForElement(SVGElement& element, ECo
     return parentColorInterpolation;
 }
 
-PassRefPtrWillBeRawPtr<FilterEffect> ReferenceFilterBuilder::build(Filter* parentFilter, LayoutObject& layoutObject, FilterEffect* previousEffect, const ReferenceFilterOperation& filterOperation)
+PassRefPtrWillBeRawPtr<FilterEffect> ReferenceFilterBuilder::build(Filter* parentFilter, Element* element, FilterEffect* previousEffect, const ReferenceFilterOperation& filterOperation)
 {
-    TreeScope* treeScope = &layoutObject.node()->treeScope();
+    TreeScope* treeScope = &element->treeScope();
 
     if (DocumentResourceReference* documentResourceRef = documentResourceReference(&filterOperation)) {
         DocumentResource* cachedSVGDocument = documentResourceRef->document();
@@ -108,7 +108,7 @@ PassRefPtrWillBeRawPtr<FilterEffect> ReferenceFilterBuilder::build(Filter* paren
     if (!filter) {
         // Although we did not find the referenced filter, it might exist later
         // in the document.
-        treeScope->document().accessSVGExtensions().addPendingResource(filterOperation.fragment(), toElement(layoutObject.node()));
+        treeScope->document().accessSVGExtensions().addPendingResource(filterOperation.fragment(), element);
         return nullptr;
     }