Factor painting code from RenderBlock into BlockPainter.

Source/core/rendering/RenderGrid.cpp

 /*
  * Copyright (C) 2011 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 1430 matching lines @@
         // Skip them here to avoid painting items several times.
         RenderBox* current = (*it).first;
         if (current == previous)
             continue;
 
         paintChild(current, paintInfo, paintOffset);
         previous = current;
     }
 }
 
+void RenderGrid::paintChild(RenderBox* child, PaintInfo& paintInfo, const LayoutPoint& paintOffset)
+{
+    LayoutPoint childPoint = flipForWritingModeForChild(child, paintOffset);
+    if (!child->hasSelfPaintingLayer() && !child->isFloating())
+        child->paint(paintInfo, childPoint);
+}
+
 const char* RenderGrid::renderName() const
 {
     if (isFloating())
         return "RenderGrid (floating)";
     if (isOutOfFlowPositioned())
         return "RenderGrid (positioned)";
     if (isAnonymous())
         return "RenderGrid (generated)";
     if (isRelPositioned())
         return "RenderGrid (relative positioned)";
     return "RenderGrid";
 }
 
 } // namespace blink