Have HTMLElements / SVGElements constructors take a Document reference in argument

Source/core/html/HTMLCanvasElement.h

 /*
  * Copyright (C) 2004, 2006, 2009, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2007 Alp Toker <alp@atoker.com>
  * Copyright (C) 2010 Torch Mobile (Beijing) Co. Ltd. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
@@ skipping 40 matching lines @@
 public:
     virtual ~CanvasObserver() { }
 
     virtual void canvasChanged(HTMLCanvasElement*, const FloatRect& changedRect) = 0;
     virtual void canvasResized(HTMLCanvasElement*) = 0;
     virtual void canvasDestroyed(HTMLCanvasElement*) = 0;
 };
 
 class HTMLCanvasElement FINAL : public HTMLElement {
 public:
-    static PassRefPtr<HTMLCanvasElement> create(Document*);
-    static PassRefPtr<HTMLCanvasElement> create(const QualifiedName&, Document*);
+    static PassRefPtr<HTMLCanvasElement> create(Document&);
+    static PassRefPtr<HTMLCanvasElement> create(const QualifiedName&, Document&);
     virtual ~HTMLCanvasElement();
 
     void addObserver(CanvasObserver*);
     void removeObserver(CanvasObserver*);
 
     // Attributes and functions exposed to script
     int width() const { return size().width(); }
     int height() const { return size().height(); }
 
     const IntSize& size() const { return m_size; }
@@ skipping 55 matching lines @@
 
     bool hasCreatedImageBuffer() const { return m_hasCreatedImageBuffer; }
 
     bool shouldAccelerate(const IntSize&) const;
 
     float deviceScaleFactor() const { return m_deviceScaleFactor; }
 
     InsertionNotificationRequest insertedInto(ContainerNode*) OVERRIDE;
 
 private:
-    HTMLCanvasElement(const QualifiedName&, Document*);
+    HTMLCanvasElement(const QualifiedName&, Document&);
 
     virtual void parseAttribute(const QualifiedName&, const AtomicString&) OVERRIDE;
     virtual RenderObject* createRenderer(RenderStyle*);
     virtual bool areAuthorShadowsAllowed() const OVERRIDE { return false; }
 
     void reset();
 
     void createImageBuffer();
     void clearImageBuffer();
 
@@ skipping 32 matching lines @@
 
 inline HTMLCanvasElement* toHTMLCanvasElement(Node* node)
 {
     ASSERT_WITH_SECURITY_IMPLICATION(!node || node->hasTagName(HTMLNames::canvasTag));
     return static_cast<HTMLCanvasElement*>(node);
 }
 
 } //namespace
 
 #endif