Have HTMLElements / SVGElements constructors take a Document reference in argument

Source/core/svg/SVGFEDisplacementMapElement.h

Index: Source/core/svg/SVGFEDisplacementMapElement.h
diff --git a/Source/core/svg/SVGFEDisplacementMapElement.h b/Source/core/svg/SVGFEDisplacementMapElement.h
index ad03ccb05961e0e6df3618999bfe48057b780367..0aa95c18b22f2ada3a3ab3880d0e4d1be2a0b7c2 100644
--- a/Source/core/svg/SVGFEDisplacementMapElement.h
+++ b/Source/core/svg/SVGFEDisplacementMapElement.h
@@ -66,12 +66,12 @@ struct SVGPropertyTraits<ChannelSelectorType> {
 
 class SVGFEDisplacementMapElement FINAL : public SVGFilterPrimitiveStandardAttributes {
 public:
-    static PassRefPtr<SVGFEDisplacementMapElement> create(const QualifiedName&, Document*);
+    static PassRefPtr<SVGFEDisplacementMapElement> create(const QualifiedName&, Document&);
 
     static ChannelSelectorType stringToChannel(const String&);
 
 private:
-    SVGFEDisplacementMapElement(const QualifiedName& tagName, Document*);
+    SVGFEDisplacementMapElement(const QualifiedName& tagName, Document&);
 
     bool isSupportedAttribute(const QualifiedName&);
     virtual void parseAttribute(const QualifiedName&, const AtomicString&) OVERRIDE;