Remove the concept of document.documentElement

sky/engine/core/rendering/RenderLayer.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011, 2012 Apple Inc. All rights reserved.
  *
  * Portions are Copyright (C) 1998 Netscape Communications Corporation.
  *
  * Other contributors:
  *   Robert O'Callahan <roc+@cs.cmu.edu>
  *   David Baron <dbaron@fas.harvard.edu>
  *   Christian Biesinger <cbiesinger@web.de>
  *   Randall Jesup <rjesup@wgate.com>
@@ skipping 1110 matching lines @@
                 break;
         }
     }
 
     return resultLayer;
 }
 
 bool RenderLayer::intersectsDamageRect(const LayoutRect& layerBounds, const LayoutRect& damageRect, const RenderLayer* rootLayer, const LayoutPoint* offsetFromRoot) const
 {
     // Always examine the canvas and the root.
-    // FIXME: Could eliminate the isDocumentElement() check if we fix background painting so that the RenderView
-    // paints the root's background.
-    if (isRootLayer() || renderer()->isDocumentElement())
+    if (isRootLayer())
         return true;
 
     // If we aren't an inline flow, and our layer bounds do intersect the damage rect, then we
     // can go ahead and return true.
     RenderView* view = renderer()->view();
     ASSERT(view);
     if (view && !renderer()->isRenderInline()) {
         if (layerBounds.intersects(damageRect))
             return true;
     }
@@ skipping 263 matching lines @@
     }
 }
 
 void showLayerTree(const blink::RenderObject* renderer)
 {
     if (!renderer)
         return;
     showLayerTree(renderer->enclosingLayer());
 }
 #endif