Merge 98112 - Fix Windows build.

Source/WebCore/rendering/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 226 matching lines @@
         m_updateCompositingLayersTimer.startOneShot(0);
 }
 
 void RenderLayerCompositor::updateCompositingLayersTimerFired(Timer<RenderLayerCompositor>*)
 {
     updateCompositingLayers();
 }
 
 bool RenderLayerCompositor::hasAnyAdditionalCompositedLayers(const RenderLayer* rootLayer) const
 {
-    return m_compositedLayerCount > rootLayer->isComposited();
+    return m_compositedLayerCount > (rootLayer->isComposited() ? 1 : 0);
 }
 
 void RenderLayerCompositor::updateCompositingLayers(CompositingUpdateType updateType, RenderLayer* updateRoot)
 {
     m_updateCompositingLayersTimer.stop();
     
     // Compositing layers will be updated in Document::implicitClose() if suppressed here.
     if (!m_renderView->document()->visualUpdatesAllowed())
         return;
 
@@ skipping 1700 matching lines @@
     if (!viewLayer->isComposited())
         return;
 
     if (GraphicsLayer* rootLayer = viewLayer->backing()->graphicsLayer())
         rootLayer->noteDeviceOrPageScaleFactorChangedIncludingDescendants();
 }
 
 } // namespace WebCore
 
 #endif // USE(ACCELERATED_COMPOSITING)