Have HTMLElements / SVGElements constructors take a Document reference in argument

Source/core/svg/SVGFEMergeElement.h

Index: Source/core/svg/SVGFEMergeElement.h
diff --git a/Source/core/svg/SVGFEMergeElement.h b/Source/core/svg/SVGFEMergeElement.h
index 87c6fccdc463d8741b59169b5cc78d38b61a898d..ab682bb5f5f5ffa28c602ae08398c875d66df488 100644
--- a/Source/core/svg/SVGFEMergeElement.h
+++ b/Source/core/svg/SVGFEMergeElement.h
@@ -28,10 +28,10 @@ namespace WebCore {
 
 class SVGFEMergeElement FINAL : public SVGFilterPrimitiveStandardAttributes {
 public:
-    static PassRefPtr<SVGFEMergeElement> create(const QualifiedName&, Document*);
+    static PassRefPtr<SVGFEMergeElement> create(const QualifiedName&, Document&);
 
 private:
-    SVGFEMergeElement(const QualifiedName&, Document*);
+    SVGFEMergeElement(const QualifiedName&, Document&);
 
     virtual PassRefPtr<FilterEffect> build(SVGFilterBuilder*, Filter*);
 };