SVG: Move/rename reference management to SVGElement

Source/core/svg/SVGFEImageElement.cpp

Index: Source/core/svg/SVGFEImageElement.cpp
diff --git a/Source/core/svg/SVGFEImageElement.cpp b/Source/core/svg/SVGFEImageElement.cpp
index e115a9bb281a59fee4295e623da70033bc204e31..74961645463325f581614c636f045850eac64993 100644
--- a/Source/core/svg/SVGFEImageElement.cpp
+++ b/Source/core/svg/SVGFEImageElement.cpp
@@ -71,7 +71,7 @@ void SVGFEImageElement::clearResourceReferences()
         m_cachedImage = 0;
     }
 
-    document().accessSVGExtensions().removeAllTargetReferencesForElement(this);
+    removeAllOutgoingReferences();
 }
 
 void SVGFEImageElement::fetchImageResource()
@@ -101,7 +101,7 @@ void SVGFEImageElement::buildPendingResource()
     } else if (target->isSVGElement()) {
         // Register us with the target in the dependencies map. Any change of hrefElement
         // that leads to relayout/repainting now informs us, so we can react to it.
-        document().accessSVGExtensions().addElementReferencingTarget(this, toSVGElement(target));
+        addReferenceTo(toSVGElement(target));
     }
 
     invalidate();