RenderLayer::hasVisibleContent() incorrect when layer removed

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 1400 matching lines @@
 
     if (oldChild->stackingNode()->isNormalFlowOnly())
         m_stackingNode->dirtyNormalFlowList();
     if (!oldChild->stackingNode()->isNormalFlowOnly() || oldChild->firstChild()) {
         // Dirty the z-order list in which we are contained.  When called via the
         // reattachment process in removeOnlyThisLayer, the layer may already be disconnected
         // from the main layer tree, so we need to null-check the |stackingContainer| value.
         oldChild->stackingNode()->dirtyStackingContainerZOrderLists();
     }
 
+    if (renderer()->style()->visibility() != VISIBLE)
+        dirtyVisibleContentStatus();
+
     oldChild->setPreviousSibling(0);
     oldChild->setNextSibling(0);
     oldChild->setParent(0);
 
     oldChild->updateDescendantDependentFlags();
     if (subtreeContainsOutOfFlowPositionedLayer(oldChild)) {
         // It may now be the case that a layer no longer has an unclipped
         // descendant. Let the compositor know that it needs to reevaluate
         // its compositing requirements to check this.
         compositor()->setNeedsUpdateCompositingRequirementsState();
@@ skipping 2600 matching lines @@
     }
 }
 
 void showLayerTree(const WebCore::RenderObject* renderer)
 {
     if (!renderer)
         return;
     showLayerTree(renderer->enclosingLayer());
 }
 #endif