Allow assertions to be enabled in Blink Release builds.

Source/core/rendering/RenderLineBoxList.h

 /*
  * Copyright (C) 2009 Apple 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:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 24 matching lines @@
 namespace WebCore {
 
 class RenderLineBoxList {
 public:
     RenderLineBoxList()
         : m_firstLineBox(0)
         , m_lastLineBox(0)
     {
     }
 
-#ifndef NDEBUG
+#if ENABLE(ASSERT)
     ~RenderLineBoxList();
 #endif
 
     InlineFlowBox* firstLineBox() const { return m_firstLineBox; }
     InlineFlowBox* lastLineBox() const { return m_lastLineBox; }
 
     void checkConsistency() const;
 
     void appendLineBox(InlineFlowBox*);
 
@@ skipping 16 matching lines @@
     bool rangeIntersectsRect(RenderBoxModelObject*, LayoutUnit logicalTop, LayoutUnit logicalBottom, const LayoutRect&, const LayoutPoint&) const;
 
     // For block flows, each box represents the root inline box for a line in the
     // paragraph.
     // For inline flows, each box represents a portion of that inline.
     InlineFlowBox* m_firstLineBox;
     InlineFlowBox* m_lastLineBox;
 };
 
 
-#ifdef NDEBUG
+#if !ENABLE(ASSERT)
 inline void RenderLineBoxList::checkConsistency() const
 {
 }
 #endif
 
 } // namespace WebCore
 
 #endif // RenderFlow_h