Begin simplifying CompositedLayerMapping::updateAfterLayout

Source/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 311 matching lines @@
         updatePagination();
         flags |= UpdatePagination;
     }
 
     if (renderer()->hasColumns())
         flags |= UpdatePagination;
 
     for (RenderLayer* child = firstChild(); child; child = child->nextSibling())
         child->updateLayerPositions(geometryMap, flags);
 
-    if ((flags & UpdateCompositingLayers) && hasCompositedLayerMapping()) {
-        CompositedLayerMapping::UpdateAfterLayoutFlags updateFlags = CompositedLayerMapping::CompositingChildrenOnly;
-        if (flags & NeedsFullRepaintInBacking)
-            updateFlags |= CompositedLayerMapping::NeedsFullRepaint;
-        if (isUpdateRoot)
-            updateFlags |= CompositedLayerMapping::IsUpdateRoot;
-        compositedLayerMapping()->updateAfterLayout(updateFlags);
-    }
+    if ((flags & UpdateCompositingLayers) && hasCompositedLayerMapping())
+        compositedLayerMapping()->updateAfterLayout(flags & NeedsFullRepaintInBacking, isUpdateRoot);
 
     if (geometryMap)
         geometryMap->popMappingsToAncestor(parent());
 }
 
 void RenderLayer::setAncestorChainHasSelfPaintingLayerDescendant()
 {
     for (RenderLayer* layer = this; layer; layer = layer->parent()) {
         if (!layer->m_hasSelfPaintingLayerDescendantDirty && layer->hasSelfPaintingLayerDescendant())
             break;
@@ skipping 3820 matching lines @@
     }
 }
 
 void showLayerTree(const WebCore::RenderObject* renderer)
 {
     if (!renderer)
         return;
     showLayerTree(renderer->enclosingLayer());
 }
 #endif