Move painting code from RenderLineBoxList to LineBoxListPainter.

Source/core/paint/LineBoxListPainter.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 LineBoxListPainter_h
+#define LineBoxListPainter_h
+
+#include "core/rendering/style/RenderStyleConstants.h"
+
+namespace blink {
+
+class LayoutPoint;
+struct PaintInfo;
+class RenderBoxModelObject;
+class RenderLineBoxList;
+
+class LineBoxListPainter {
+public:
+    LineBoxListPainter(RenderLineBoxList& renderLineBoxList) : m_renderLineBoxList(renderLineBoxList) { }
+
+    void paint(RenderBoxModelObject*, PaintInfo&, const LayoutPoint&) const;
+
+private:
+    RenderLineBoxList& m_renderLineBoxList;
+};
+
+} // namespace blink
+
+#endif // LineBoxListPainter_h