Have HTMLElements / SVGElements constructors take a Document reference in argument

Source/core/svg/animation/SVGSMILElement.h

Index: Source/core/svg/animation/SVGSMILElement.h
diff --git a/Source/core/svg/animation/SVGSMILElement.h b/Source/core/svg/animation/SVGSMILElement.h
index c6cbd1a6a2efc5ba145a9951519ba4d4b7c3131e..d0b53e4c8963c122ef8bbf4f2f3f33c745deb789 100644
--- a/Source/core/svg/animation/SVGSMILElement.h
+++ b/Source/core/svg/animation/SVGSMILElement.h
@@ -42,7 +42,7 @@ typedef EventSender<SVGSMILElement> SMILEventSender;
 // This class implements SMIL interval timing model as needed for SVG animation.
 class SVGSMILElement : public SVGElement {
 public:
-    SVGSMILElement(const QualifiedName&, Document*);
+    SVGSMILElement(const QualifiedName&, Document&);
     virtual ~SVGSMILElement();
 
     static bool isSMILElement(Node*);