Have HTMLElements / SVGElements constructors take a Document reference in argument

Source/core/svg/SVGSymbolElement.h

Index: Source/core/svg/SVGSymbolElement.h
diff --git a/Source/core/svg/SVGSymbolElement.h b/Source/core/svg/SVGSymbolElement.h
index a5a10684e08073fcb8b2ae7edcfc56f521b9be54..9d010de67c56f0916f5caaf8340dfebb0feff471 100644
--- a/Source/core/svg/SVGSymbolElement.h
+++ b/Source/core/svg/SVGSymbolElement.h
@@ -34,10 +34,10 @@ class SVGSymbolElement FINAL : public SVGElement,
                                public SVGExternalResourcesRequired,
                                public SVGFitToViewBox {
 public:
-    static PassRefPtr<SVGSymbolElement> create(const QualifiedName&, Document*);
+    static PassRefPtr<SVGSymbolElement> create(const QualifiedName&, Document&);
 
 private:
-    SVGSymbolElement(const QualifiedName&, Document*);
+    SVGSymbolElement(const QualifiedName&, Document&);
 
     virtual bool supportsFocus() const OVERRIDE { return hasFocusEventListeners(); }