Move painting code from RenderGrid to GridPainter.

Source/core/paint/GridPainter.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 ViewPainter_h
-#define ViewPainter_h
+#ifndef GridPainter_h
+#define GridPainter_h
 
 namespace blink {
 
+struct PaintInfo;
 class LayoutPoint;
-struct PaintInfo;
 class RenderBox;
-class RenderView;
+class RenderGrid;
 
-class ViewPainter {
+class GridPainter {
 public:
-    ViewPainter(RenderView& renderView) : m_renderView(renderView) { }
+    GridPainter(RenderGrid& renderGrid) : m_renderGrid(renderGrid) { }
+
+    void paintChildren(PaintInfo&, const LayoutPoint&);
+    void paintChild(RenderBox*, PaintInfo&, const LayoutPoint&);
 
     void paint(PaintInfo&, const LayoutPoint& paintOffset);
-    void paintBoxDecorationBackground(PaintInfo&);
 
 private:
-    bool rootFillsViewportBackground(RenderBox* rootBox) const;
-
-    RenderView& m_renderView;
+    RenderGrid& m_renderGrid;
 };
 
 } // namespace blink
 
-#endif // ViewPainter_h
+#endif // GridPainter_h