Allow assertions to be enabled in Blink Release builds.

Source/core/rendering/RenderView.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2006 Apple Computer, Inc.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
@@ skipping 151 matching lines @@
     virtual void mapAbsoluteToLocalPoint(MapCoordinatesFlags, TransformState&) const OVERRIDE;
     virtual void computeSelfHitTestRects(Vector<LayoutRect>&, const LayoutPoint& layerOffset) const OVERRIDE;
 
     virtual void invalidateTreeIfNeeded(const PaintInvalidationState&) OVERRIDE FINAL;
 
     bool shouldRepaint(const LayoutRect&) const;
 
     bool rootFillsViewportBackground(RenderBox* rootBox) const;
 
     void layoutContent();
-#ifndef NDEBUG
+#if ENABLE(ASSERT)
     void checkLayoutState();
 #endif
 
     void positionDialog(RenderBox*);
     void positionDialogs();
 
     friend class ForceHorriblySlowRectMapping;
 
     bool shouldUsePrintingLayout() const;
 
@@ skipping 44 matching lines @@
             m_paintInvalidationState->m_cachedOffsetsEnabled = true;
     }
 private:
     const PaintInvalidationState* m_paintInvalidationState;
     bool m_didDisable;
 };
 
 } // namespace WebCore
 
 #endif // RenderView_h