Allow assertions to be enabled in Blink Release builds.

Source/core/rendering/RenderLineBoxList.cpp

 /*
  * Copyright (C) 2008 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 20 matching lines @@
 
 #include "core/rendering/HitTestResult.h"
 #include "core/rendering/InlineTextBox.h"
 #include "core/rendering/PaintInfo.h"
 #include "core/rendering/RenderInline.h"
 #include "core/rendering/RenderView.h"
 #include "core/rendering/RootInlineBox.h"
 
 namespace WebCore {
 
-#ifndef NDEBUG
+#if ENABLE(ASSERT)
 RenderLineBoxList::~RenderLineBoxList()
 {
     ASSERT(!m_firstLineBox);
     ASSERT(!m_lastLineBox);
 }
 #endif
 
 void RenderLineBoxList::appendLineBox(InlineFlowBox* box)
 {
     checkConsistency();
@@ skipping 297 matching lines @@
         if (adjacentBox)
             adjacentBox->markDirty();
         adjacentBox = box->nextRootBox();
         // If |child| or any of its immediately previous siblings with culled lineboxes is the object after a line-break in |box| or the linebox after it
         // then that means |child| actually sits on the linebox after |box| (or is its line-break object) and so we need to dirty it as well.
         if (adjacentBox && (potentialLineBreakObjects.contains(box->lineBreakObj()) || potentialLineBreakObjects.contains(adjacentBox->lineBreakObj()) || child->isBR() || isIsolated(container->style()->unicodeBidi())))
             adjacentBox->markDirty();
     }
 }
 
-#ifndef NDEBUG
+#if ENABLE(ASSERT)
 
 void RenderLineBoxList::checkConsistency() const
 {
 #ifdef CHECK_CONSISTENCY
     const InlineFlowBox* prev = 0;
     for (const InlineFlowBox* child = m_firstLineBox; child != 0; child = child->nextLineBox()) {
         ASSERT(child->prevLineBox() == prev);
         prev = child;
     }
     ASSERT(prev == m_lastLineBox);
 #endif
 }
 
 #endif
 
 }