Get rid of lazy block.

Source/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 2139 matching lines @@
 
     // Update the positions of our child layers (if needed as only fixed layers should be impacted by a scroll).
     // We don't update compositing layers, because we need to do a deep update from the compositing ancestor.
     bool inLayout = view ? view->frameView()->isInLayout() : false;
     if (!inLayout) {
         // If we're in the middle of layout, we'll just update layers once layout has finished.
         updateLayerPositionsAfterOverflowScroll();
         if (view) {
             // Update regions, scrolling may change the clip of a particular region.
             view->frameView()->updateAnnotatedRegions();
-
             view->updateWidgetPositions();
-
-            view->markLazyBlocksForLayout();
         }
 
         updateCompositingLayersAfterScroll();
     }
 
     RenderLayerModelObject* repaintContainer = renderer()->containerForRepaint();
     if (frame) {
         // The caret rect needs to be invalidated after scrolling
         frame->selection()->setCaretRectNeedsUpdate();
 
@@ skipping 4177 matching lines @@
     }
 }
 
 void showLayerTree(const WebCore::RenderObject* renderer)
 {
     if (!renderer)
         return;
     showLayerTree(renderer->enclosingLayer());
 }
 #endif