Merge from Chromium at DEPS revision 222756

This commit was generated by merge_to_master.py.

Change-Id: I085d892f6f1583a45f10eb394f195bbea5a334ef
diff --git a/Source/core/svg/SVGPolyElement.h b/Source/core/svg/SVGPolyElement.h
index f7bb439..617de15 100644
--- a/Source/core/svg/SVGPolyElement.h
+++ b/Source/core/svg/SVGPolyElement.h
@@ -40,7 +40,7 @@
     static const SVGPropertyInfo* pointsPropertyInfo();
 
 protected:
-    SVGPolyElement(const QualifiedName&, Document*);
+    SVGPolyElement(const QualifiedName&, Document&);
 
 private:
     virtual bool isValid() const { return SVGTests::isValid(); }