Move paint code from RootInlineBox and EllipsisBox to RootInlineBoxPainter and EllipsisBoxPainter.

Source/core/paint/RootInlineBoxPainter.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 RootInlineBoxPainter_h
+#define RootInlineBoxPainter_h
+
+namespace blink {
+
+struct PaintInfo;
+class LayoutPoint;
+class LayoutUnit;
+class RootInlineBox;
+
+class RootInlineBoxPainter {
+public:
+    RootInlineBoxPainter(RootInlineBox& rootInlineBox) : m_rootInlineBox(rootInlineBox) { }
+
+    void paint(PaintInfo&, const LayoutPoint&, LayoutUnit lineTop, LayoutUnit lineBottom);
+
+private:
+    void paintEllipsisBox(PaintInfo&, const LayoutPoint& paintOffset, LayoutUnit lineTop, LayoutUnit lineBottom) const;
+
+    RootInlineBox& m_rootInlineBox;
+};
+
+} // namespace blink
+
+#endif // RootInlineBoxPainter_h