Move RenderSVGImage's paint code to SVGImagePainter

Source/core/paint/SVGImagePainter.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 SVGImagePainter_h
+#define SVGImagePainter_h
+
+namespace blink {
+
+struct PaintInfo;
+class RenderSVGImage;
+
+class SVGImagePainter {
+public:
+    SVGImagePainter(RenderSVGImage& renderSVGImage) : m_renderSVGImage(renderSVGImage) { }
+
+    void paint(PaintInfo&);
+
+    // Assumes the PaintInfo context has had all local transforms applied.
+    static void paintForeground(RenderSVGImage&, PaintInfo&);
+
+private:
+    RenderSVGImage& m_renderSVGImage;
+};
+
+} // namespace blink
+
+#endif // SVGImagePainter_h