Remove a bunch of dead code from RenderLayer

sky/engine/core/rendering/RenderLayerModelObject.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2005 Allan Sandfeld Jensen (kde@carewolf.com)
  *           (C) 2005, 2006 Samuel Weinig (sam.weinig@gmail.com)
  * Copyright (C) 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
  * Copyright (C) 2010, 2012 Google Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
@@ skipping 126 matching lines @@
 }
 
 void RenderLayerModelObject::invalidateTreeIfNeeded(const PaintInvalidationState& paintInvalidationState)
 {
     // FIXME: SVG should probably also go through this unified paint invalidation system.
     ASSERT(!needsLayout());
 
     if (!shouldCheckForPaintInvalidation(paintInvalidationState))
         return;
 
-    bool establishesNewPaintInvalidationContainer = isPaintInvalidationContainer();
-    const RenderLayerModelObject& newPaintInvalidationContainer = *adjustCompositedContainerForSpecialAncestors(establishesNewPaintInvalidationContainer ? this : &paintInvalidationState.paintInvalidationContainer());
+    const RenderLayerModelObject& newPaintInvalidationContainer = *adjustCompositedContainerForSpecialAncestors(&paintInvalidationState.paintInvalidationContainer());
     ASSERT(&newPaintInvalidationContainer == containerForPaintInvalidation());
 
     InvalidationReason reason = invalidatePaintIfNeeded(paintInvalidationState, newPaintInvalidationContainer);
 
     PaintInvalidationState childTreeWalkState(paintInvalidationState, *this, newPaintInvalidationContainer);
     if (reason == InvalidationLocationChange || reason == InvalidationFull)
         childTreeWalkState.setForceCheckForPaintInvalidation();
     RenderObject::invalidateTreeIfNeeded(childTreeWalkState);
 }
 
 } // namespace blink