Clean up creation of "detached" SVG* data type objects

third_party/WebKit/Source/core/svg/SVGGraphicsElement.cpp

 /*
  * Copyright (C) 2004, 2005, 2008 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005, 2006 Rob Buis <buis@kde.org>
  * Copyright (C) 2014 Google, Inc.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
@@ skipping 155 matching lines @@
   return GetLayoutObject()->ObjectBoundingBox();
 }
 
 SVGRectTearOff* SVGGraphicsElement::getBBoxFromJavascript() {
   GetDocument().UpdateStyleAndLayoutIgnorePendingStylesheets();
 
   // FIXME: Eventually we should support getBBox for detached elements.
   FloatRect boundingBox;
   if (GetLayoutObject())
     boundingBox = GetBBox();
-  return SVGRectTearOff::Create(SVGRect::Create(boundingBox), 0,
-                                kPropertyIsNotAnimVal);
+  return SVGRectTearOff::CreateDetached(boundingBox);
 }
 
 }  // namespace blink