Remove the concept of document.documentElement

sky/engine/core/rendering/RenderFlexibleBox.cpp

 /*
  * Copyright (C) 2011 Google 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 221 matching lines @@
         prepareOrderIteratorAndMargins();
 
         ChildFrameRects oldChildRects;
         appendChildFrameRects(oldChildRects);
 
         layoutFlexItems(relayoutChildren);
 
         if (logicalHeight() != previousHeight)
             relayoutChildren = true;
 
-        layoutPositionedObjects(relayoutChildren || isDocumentElement());
+        layoutPositionedObjects(relayoutChildren);
 
         // FIXME: css3/flexbox/repaint-rtl-column.html seems to issue paint invalidations for more overflow than it needs to.
         computeOverflow(clientLogicalBottomAfterRepositioning());
     }
 
     updateLayerTransformAfterLayout();
 
     clearNeedsLayout();
 }
 
@@ skipping 1035 matching lines @@
             ASSERT(child);
             LayoutUnit lineCrossAxisExtent = lineContexts[lineNumber].crossAxisExtent;
             LayoutUnit originalOffset = lineContexts[lineNumber].crossAxisOffset - crossAxisStartEdge;
             LayoutUnit newOffset = contentExtent - originalOffset - lineCrossAxisExtent;
             adjustAlignmentForChild(child, newOffset - originalOffset);
         }
     }
 }
 
 }