Implement interfaces in PaintInfo and make it a class.

Source/core/rendering/RenderInline.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
@@ skipping 1400 matching lines @@
         return;
 
     RenderStyle* styleToUse = style();
     if (styleToUse->outlineStyleIsAuto() || hasOutlineAnnotation()) {
         if (theme()->shouldDrawDefaultFocusRing(this)) {
             // Only paint the focus ring by hand if the theme isn't able to draw the focus ring.
             paintFocusRing(paintInfo, paintOffset, styleToUse);
         }
     }
 
-    GraphicsContext* graphicsContext = paintInfo.context;
+    GraphicsContext* graphicsContext = paintInfo.getContext();
     if (graphicsContext->paintingDisabled())
         return;
 
     if (styleToUse->outlineStyleIsAuto() || styleToUse->outlineStyle() == BNONE)
         return;
 
     Vector<LayoutRect> rects;
 
     rects.append(LayoutRect());
     for (InlineFlowBox* curr = firstLineBox(); curr; curr = curr->nextLineBox()) {
@@ skipping 145 matching lines @@
         container = this;
 
     FloatPoint absPos = container->localToAbsolute();
     region.bounds.setX(absPos.x() + region.bounds.x());
     region.bounds.setY(absPos.y() + region.bounds.y());
 
     regions.append(region);
 }
 
 } // namespace WebCore