Have HTMLElements / SVGElements constructors take a Document reference in argument

Source/core/html/HTMLUnknownElement.h

Index: Source/core/html/HTMLUnknownElement.h
diff --git a/Source/core/html/HTMLUnknownElement.h b/Source/core/html/HTMLUnknownElement.h
index 4839654613b16abc57f2f0e6e7dc9dad60de1429..be493b1bf4e48fbe3e83c8305565e96733aeadb6 100644
--- a/Source/core/html/HTMLUnknownElement.h
+++ b/Source/core/html/HTMLUnknownElement.h
@@ -36,7 +36,7 @@ namespace WebCore {
 
 class HTMLUnknownElement FINAL : public HTMLElement {
 public:
-    static PassRefPtr<HTMLUnknownElement> create(const QualifiedName& tagName, Document* document)
+    static PassRefPtr<HTMLUnknownElement> create(const QualifiedName& tagName, Document& document)
     {
         return adoptRef(new HTMLUnknownElement(tagName, document));
     }
@@ -44,7 +44,7 @@ public:
     virtual bool isHTMLUnknownElement() const OVERRIDE { return true; }
 
 private:
-    HTMLUnknownElement(const QualifiedName& tagName, Document* document)
+    HTMLUnknownElement(const QualifiedName& tagName, Document& document)
         : HTMLElement(tagName, document)
     {
         ScriptWrappable::init(this);