Fully update compositing information for *layerTreeAsText calls

Source/core/rendering/compositing/RenderLayerCompositor.cpp

 /*
  * Copyright (C) 2009, 2010 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 1322 matching lines @@
 
 bool RenderLayerCompositor::scrollingLayerDidChange(RenderLayer* layer)
 {
     if (ScrollingCoordinator* scrollingCoordinator = this->scrollingCoordinator())
         return scrollingCoordinator->scrollableAreaScrollLayerDidChange(layer->scrollableArea());
     return false;
 }
 
 String RenderLayerCompositor::layerTreeAsText(LayerTreeFlags flags)
 {
-    // Before dumping the layer tree, finish any pending compositing update.
-    updateCompositingLayers();
+    ASSERT(m_renderView.document().lifecycle().state() >= DocumentLifecycle::CompositingClean);
 
     if (!m_rootContentLayer)
         return String();
 
     // We skip dumping the scroll and clip layers to keep layerTreeAsText output
     // similar between platforms (unless we explicitly request dumping from the
     // root.
     GraphicsLayer* rootLayer = m_rootContentLayer.get();
     if (flags & LayerTreeIncludesRootLayer)
         rootLayer = rootGraphicsLayer();
@@ skipping 888 matching lines @@
     } else if (graphicsLayer == m_scrollLayer.get()) {
         name = "LocalFrame Scrolling Layer";
     } else {
         ASSERT_NOT_REACHED();
     }
 
     return name;
 }
 
 } // namespace WebCore