Delete a bunch of paint invalidation rect computing code.

sky/engine/core/rendering/RenderReplaced.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2000 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004, 2006, 2007 Apple Inc. All rights reserved.
  * Copyright (C) Research In Motion Limited 2011-2012. 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 461 matching lines @@
 }
 
 void RenderReplaced::setSelectionState(SelectionState state)
 {
     // The selection state for our containing block hierarchy is updated by the base class call.
     RenderBox::setSelectionState(state);
 
     if (!inlineBoxWrapper())
         return;
 
-    // We only include the space below the baseline in our layer's cached paint invalidation rect if the
-    // image is selected. Since the selection state has changed update the rect.
-    if (hasLayer())
-        setPreviousPaintInvalidationRect(boundsRectForPaintInvalidation(containerForPaintInvalidation()));
-
     if (canUpdateSelectionOnRootLineBoxes())
         inlineBoxWrapper()->root().setHasSelectedChildren(isSelected());
 }
 
 bool RenderReplaced::isSelected() const
 {
     SelectionState s = selectionState();
     if (s == SelectionNone)
         return false;
     if (s == SelectionInside)
         return true;
 
     int selectionStart, selectionEnd;
     selectionStartEnd(selectionStart, selectionEnd);
     if (s == SelectionStart)
         return selectionStart == 0;
 
     int end = node()->hasChildren() ? node()->countChildren() : 1;
     if (s == SelectionEnd)
         return selectionEnd == end;
     if (s == SelectionBoth)
         return selectionStart == 0 && selectionEnd == end;
 
     ASSERT(0);
     return false;
 }
 
-LayoutRect RenderReplaced::clippedOverflowRectForPaintInvalidation(const RenderLayerModelObject* paintInvalidationContainer, const PaintInvalidationState* paintInvalidationState) const
-{
-    // The selectionRect can project outside of the overflowRect, so take their union
-    // for paint invalidation to avoid selection painting glitches.
-    LayoutRect r = isSelected() ? localSelectionRect() : visualOverflowRect();
-    mapRectToPaintInvalidationBacking(paintInvalidationContainer, r, paintInvalidationState);
-    return r;
 }
-
-}