Revert of Revert of Divorce PaintInvalidationState from LayoutState

Source/core/rendering/RenderBlockFlow.cpp

 /*
  * Copyright (C) 2013 Google 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 1884 matching lines @@
 
 }
 
 void RenderBlockFlow::invalidatePaintForOverhangingFloats(bool paintAllDescendants)
 {
     // Repaint any overhanging floats (if we know we're the one to paint them).
     // Otherwise, bail out.
     if (!hasOverhangingFloats())
         return;
 
-    // FIXME: Avoid disabling LayoutState. At the very least, don't disable it for floats originating
-    // in this block. Better yet would be to push extra state for the containers of other floats.
-    ForceHorriblySlowRectMapping slowRectMapping(*this);
     const FloatingObjectSet& floatingObjectSet = m_floatingObjects->set();
     FloatingObjectSetIterator end = floatingObjectSet.end();
     for (FloatingObjectSetIterator it = floatingObjectSet.begin(); it != end; ++it) {
         FloatingObject* floatingObject = it->get();
         // Only repaint the object if it is overhanging, is not in its own layer, and
         // is our responsibility to paint (m_shouldPaint is set). When paintAllDescendants is true, the latter
         // condition is replaced with being a descendant of us.
         if (logicalBottomForFloat(floatingObject) > logicalHeight()
             && !floatingObject->renderer()->hasSelfPaintingLayer()
             && (floatingObject->shouldPaint() || (paintAllDescendants && floatingObject->renderer()->isDescendantOf(this)))) {
@@ skipping 881 matching lines @@
 RenderBlockFlow::RenderBlockFlowRareData& RenderBlockFlow::ensureRareData()
 {
     if (m_rareData)
         return *m_rareData;
 
     m_rareData = adoptPtr(new RenderBlockFlowRareData(this));
     return *m_rareData;
 }
 
 } // namespace WebCore