Have SVGURIReference API deal with Document references, not pointers

Source/core/svg/SVGTRefElement.cpp

Index: Source/core/svg/SVGTRefElement.cpp
diff --git a/Source/core/svg/SVGTRefElement.cpp b/Source/core/svg/SVGTRefElement.cpp
index 1244e9ecb4178c2e9489e4a5d05106558986d914..4ab06bb7f063549a821a3917707c13e3dfaa351a 100644
--- a/Source/core/svg/SVGTRefElement.cpp
+++ b/Source/core/svg/SVGTRefElement.cpp
@@ -167,7 +167,7 @@ void SVGTRefElement::detachTarget()
 
     // Mark the referenced ID as pending.
     String id;
-    SVGURIReference::targetElementFromIRIString(hrefCurrentValue(), &document(), &id);
+    SVGURIReference::targetElementFromIRIString(hrefCurrentValue(), document(), &id);
     if (!id.isEmpty())
         document().accessSVGExtensions()->addPendingResource(id, this);
 }
@@ -247,7 +247,7 @@ void SVGTRefElement::buildPendingResource()
         return;
 
     String id;
-    RefPtr<Element> target = SVGURIReference::targetElementFromIRIString(hrefCurrentValue(), &document(), &id);
+    RefPtr<Element> target = SVGURIReference::targetElementFromIRIString(hrefCurrentValue(), document(), &id);
     if (!target.get()) {
         if (id.isEmpty())
             return;