Delete RenderLayer::updateLayerPositionsAfterDocumentScroll

Source/core/rendering/RenderLayerClipper.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 110 matching lines @@
     // FIXME: it's not clear how this layer not having clip rects guarantees that no descendants have any.
     if (!m_cache)
         return;
 
     m_cache->clear(cacheSlot);
 
     for (RenderLayer* layer = m_renderer.layer()->firstChild(); layer; layer = layer->nextSibling())
         layer->clipper().clearClipRectsIncludingDescendants(cacheSlot);
 }
 
-void RenderLayerClipper::clearClipRects()
-{
-    m_cache = nullptr;
-}
-
 LayoutRect RenderLayerClipper::childrenClipRect() const
 {
     // FIXME: border-radius not accounted for.
     // FIXME: Regions not accounted for.
     RenderLayer* clippingRootLayer = clippingRootForPainting();
     LayoutRect layerBounds;
     ClipRect backgroundRect, foregroundRect, outlineRect;
     // Need to use uncached clip rects, because the value of 'dontClipToOverflow' may be different from the painting path (<rdar://problem/11844909>).
     ClipRectsContext context(clippingRootLayer, UncachedClipRects);
     calculateRects(context, m_renderer.view()->unscaledDocumentRect(), layerBounds, backgroundRect, foregroundRect, outlineRect);
@@ skipping 230 matching lines @@
         ASSERT(current);
         if (current->transform() || current->isPaintInvalidationContainer())
             return const_cast<RenderLayer*>(current);
     }
 
     ASSERT_NOT_REACHED();
     return 0;
 }
 
 } // namespace WebCore