Delete an assortment of unneeded paint invalidation code.

sky/engine/core/rendering/RenderLayer.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011, 2012 Apple Inc. All rights reserved.
  *
  * Portions are Copyright (C) 1998 Netscape Communications Corporation.
  *
  * Other contributors:
  *   Robert O'Callahan <roc+@cs.cmu.edu>
  *   David Baron <dbaron@fas.harvard.edu>
  *   Christian Biesinger <cbiesinger@web.de>
  *   Randall Jesup <rjesup@wgate.com>
@@ skipping 1642 matching lines @@
     m_blockSelectionGapsBounds.unite(enclosingIntRect(bounds));
 }
 
 void RenderLayer::clearBlockSelectionGapsBounds()
 {
     m_blockSelectionGapsBounds = IntRect();
     for (RenderLayer* child = firstChild(); child; child = child->nextSibling())
         child->clearBlockSelectionGapsBounds();
 }
 
-void RenderLayer::invalidatePaintForBlockSelectionGaps()
-{
-    for (RenderLayer* child = firstChild(); child; child = child->nextSibling())
-        child->invalidatePaintForBlockSelectionGaps();
-
-    if (m_blockSelectionGapsBounds.isEmpty())
-        return;
-
-    LayoutRect rect = m_blockSelectionGapsBounds;
-    if (renderer()->hasOverflowClip()) {
-        RenderBox* box = renderBox();
-        rect.move(-box->scrolledContentOffset());
-        rect.intersect(box->overflowClipRect(LayoutPoint()));
-    }
-    if (renderer()->hasClip())
-        rect.intersect(toRenderBox(renderer())->clipRect(LayoutPoint()));
-    if (!rect.isEmpty())
-        renderer()->invalidatePaintRectangle(rect);
-}
-
 IntRect RenderLayer::blockSelectionGapsBounds() const
 {
     if (!renderer()->isRenderBlock())
         return IntRect();
 
     RenderBlock* renderBlock = toRenderBlock(renderer());
     LayoutRect gapRects = renderBlock->selectionGapRectsForPaintInvalidation(renderBlock);
 
     return pixelSnappedIntRect(gapRects);
 }
@@ skipping 359 matching lines @@
     }
 }
 
 void showLayerTree(const blink::RenderObject* renderer)
 {
     if (!renderer)
         return;
     showLayerTree(renderer->enclosingLayer());
 }
 #endif