Have HTMLElements / SVGElements constructors take a Document reference in argument

Source/core/html/HTMLHRElement.h

Index: Source/core/html/HTMLHRElement.h
diff --git a/Source/core/html/HTMLHRElement.h b/Source/core/html/HTMLHRElement.h
index b4498e73154ca6d27226058ea53f2872b6b45341..7fc185def08ed7fbf52cf65fda75935328656a4f 100644
--- a/Source/core/html/HTMLHRElement.h
+++ b/Source/core/html/HTMLHRElement.h
@@ -29,13 +29,13 @@ namespace WebCore {
 
 class HTMLHRElement FINAL : public HTMLElement {
 public:
-    static PassRefPtr<HTMLHRElement> create(Document*);
-    static PassRefPtr<HTMLHRElement> create(const QualifiedName&, Document*);
+    static PassRefPtr<HTMLHRElement> create(Document&);
+    static PassRefPtr<HTMLHRElement> create(const QualifiedName&, Document&);
 
     virtual bool canContainRangeEndPoint() const { return hasChildNodes(); }
 
 private:
-    HTMLHRElement(const QualifiedName&, Document*);
+    HTMLHRElement(const QualifiedName&, Document&);
 
     virtual bool isPresentationAttribute(const QualifiedName&) const OVERRIDE;
     virtual void collectStyleForPresentationAttribute(const QualifiedName&, const AtomicString&, MutableStylePropertySet*) OVERRIDE;