Implement interfaces in PaintInfo and make it a class.

Source/core/rendering/RenderObject.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Dirk Mueller (mueller@kde.org)
  *           (C) 2004 Allan Sandfeld Jensen (kde@carewolf.com)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2009 Google Inc. All rights reserved.
  * Copyright (C) 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  *
  * This library is free software; you can redistribute it and/or
@@ skipping 1103 matching lines @@
             graphicsContext->drawConvexPolygon(4, quad, antialias);
             graphicsContext->setStrokeStyle(oldStrokeStyle);
             break;
         }
     }
 }
 
 void RenderObject::paintFocusRing(PaintInfo& paintInfo, const LayoutPoint& paintOffset, RenderStyle* style)
 {
     Vector<IntRect> focusRingRects;
-    addFocusRingRects(focusRingRects, paintOffset, paintInfo.paintContainer);
+    addFocusRingRects(focusRingRects, paintOffset, paintInfo.paintContainer());
     if (style->outlineStyleIsAuto())
         paintInfo.context->drawFocusRing(focusRingRects, style->outlineWidth(), style->outlineOffset(), resolveColor(style, CSSPropertyOutlineColor));
     else
         addPDFURLRect(paintInfo.context, unionRect(focusRingRects));
 }
 
 void RenderObject::addPDFURLRect(GraphicsContext* context, const LayoutRect& rect)
 {
     if (rect.isEmpty())
         return;
@@ skipping 2178 matching lines @@
 {
     if (object1) {
         const WebCore::RenderObject* root = object1;
         while (root->parent())
             root = root->parent();
         root->showRenderTreeAndMark(object1, "*", object2, "-", 0);
     }
 }
 
 #endif