Revert "Re-land deferred compositing updates with fixed assumptions"

Source/core/rendering/RenderLayerStackingNode.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 137 matching lines @@
     if (m_negZOrderList)
         m_negZOrderList->clear();
     m_zOrderListsDirty = true;
 
     m_descendantsAreContiguousInStackingOrderDirty = true;
 
     if (!renderer()->documentBeingDestroyed()) {
         compositor()->setNeedsUpdateCompositingRequirementsState();
         compositor()->setCompositingLayersNeedRebuild();
         if (layer()->acceleratedCompositingForOverflowScrollEnabled())
-            compositor()->setNeedsToRecomputeCompositingRequirements();
+            compositor()->setShouldReevaluateCompositingAfterLayout();
     }
 }
 
 void RenderLayerStackingNode::dirtyStackingContainerZOrderLists()
 {
     // Any siblings in the ancestor stacking context could also be affected.
     // Changing z-index, for example, could cause us to stack in between a
     // sibling's descendants, meaning that we have to recompute
     // m_descendantsAreContiguousInStackingOrder for that sibling.
     dirtySiblingStackingNodeCanBePromotedToStackingContainer();
@@ skipping 20 matching lines @@
     updateStackingParentForNormalFlowList(0);
 #endif
 
     if (m_normalFlowList)
         m_normalFlowList->clear();
     m_normalFlowListDirty = true;
 
     if (!renderer()->documentBeingDestroyed()) {
         compositor()->setCompositingLayersNeedRebuild();
         if (layer()->acceleratedCompositingForOverflowScrollEnabled())
-            compositor()->setNeedsToRecomputeCompositingRequirements();
+            compositor()->setShouldReevaluateCompositingAfterLayout();
     }
 }
 
 void RenderLayerStackingNode::rebuildZOrderLists()
 {
     ASSERT(m_layerListMutationAllowed);
     ASSERT(isDirtyStackingContainer());
     rebuildZOrderLists(m_posZOrderList, m_negZOrderList);
 
 #if !ASSERT_DISABLED
@@ skipping 445 matching lines @@
         return ancestor->stackingNode();
     return 0;
 }
 
 RenderLayerModelObject* RenderLayerStackingNode::renderer() const
 {
     return m_layer->renderer();
 }
 
 } // namespace WebCore