RenderLayer::hasVisibleContent should ASSERT(!m_visibleContentStatusDirty)

Source/core/rendering/RenderObject.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Dirk Mueller (mueller@kde.org)
  *           (C) 2004 Allan Sandfeld Jensen (kde@carewolf.com)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2009 Google Inc. All rights reserved.
  * Copyright (C) 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  *
  * This library is free software; you can redistribute it and/or
@@ skipping 2103 matching lines @@
             if (AXObjectCache* cache = document().existingAXObjectCache())
                 cache->childrenChanged(parent());
         }
 
         // Keep layer hierarchy visibility bits up to date if visibility changes.
         if (m_style->visibility() != newStyle.visibility()) {
             // We might not have an enclosing layer yet because we might not be in the tree.
             if (RenderLayer* layer = enclosingLayer()) {
                 if (newStyle.visibility() == VISIBLE) {
                     layer->setHasVisibleContent();
-                } else if (layer->hasVisibleContent() && (this == layer->renderer() || layer->renderer()->style()->visibility() != VISIBLE)) {
-                    layer->dirtyVisibleContentStatus();
+                } else {
+                    layer->potentiallyDirtyVisibleContentStatus(newStyle.visibility());
                 }
             }
         }
 
         if (isFloating() && (m_style->floating() != newStyle.floating()))
             // For changes in float styles, we need to conceivably remove ourselves
             // from the floating objects list.
             toRenderBox(this)->removeFloatingOrPositionedChildFromBlockLists();
         else if (isOutOfFlowPositioned() && (m_style->position() != newStyle.position()))
             // For changes in positioning styles, we need to conceivably remove ourselves
@@ skipping 1339 matching lines @@
 {
     if (object1) {
         const blink::RenderObject* root = object1;
         while (root->parent())
             root = root->parent();
         root->showRenderTreeAndMark(object1, "*", object2, "-", 0);
     }
 }
 
 #endif