Generalize visible descendant dirty bits to prepare for more properties.

third_party/WebKit/Source/core/layout/LayoutObject.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/)
@@ skipping 1735 matching lines @@
       document().setAnnotatedRegionsDirty(true);
       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 (PaintLayer* layer = enclosingLayer())
-        layer->potentiallyDirtyVisibleContentStatus(newStyle.visibility());
+        layer->dirtyVisibleContentStatus();
     }
 
     if (isFloating() && (m_style->floating() != newStyle.floating())) {
       // For changes in float styles, we need to conceivably remove ourselves
       // from the floating objects list.
       toLayoutBox(this)->removeFloatingOrPositionedChildFromBlockLists();
     } else if (isOutOfFlowPositioned() &&
                (m_style->position() != newStyle.position())) {
       // For changes in positioning styles, we need to conceivably remove
       // ourselves from the positioned objects list.
@@ skipping 1735 matching lines @@
     const blink::LayoutObject* root = object1;
     while (root->parent())
       root = root->parent();
     root->showLayoutTreeAndMark(object1, "*", object2, "-", 0);
   } else {
     WTFLogAlways("%s", "Cannot showLayoutTree. Root is (nil)");
   }
 }
 
 #endif