Factor SVG root painter code into SVGRootPainter

Source/core/paint/SVGRootPainter.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef ReplacedPainter_h
-#define ReplacedPainter_h
+#ifndef SVGRootPainter_h
+#define SVGRootPainter_h
 
 namespace blink {
 
 struct PaintInfo;
 class LayoutPoint;
-class RenderReplaced;
+class RenderSVGRoot;
 
-class ReplacedPainter {
+class SVGRootPainter {
 public:
-    ReplacedPainter(RenderReplaced& renderReplaced) : m_renderReplaced(renderReplaced) { }
+    SVGRootPainter(RenderSVGRoot& renderSVGRoot) : m_renderSVGRoot(renderSVGRoot) { }
 
     void paint(PaintInfo&, const LayoutPoint&);
 
 private:
-    RenderReplaced& m_renderReplaced;
+    RenderSVGRoot& m_renderSVGRoot;
 };
 
 } // namespace blink
 
-#endif // ReplacedPainter_h
+#endif // SVGRootPainter_h