Start removing the double-negative !ASSERT_DISABLED

Source/core/editing/TextIterator.cpp

 /*
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2005 Alexey Proskuryakov.
  *
  * 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 140 matching lines @@
     return m_words.last() & (1U << shift);
 }
 
 unsigned BitStack::size() const
 {
     return m_size;
 }
 
 // --------
 
-#if !ASSERT_DISABLED
+#if ASSERT_ENABLED
 
 static unsigned depthCrossingShadowBoundaries(Node* node)
 {
     unsigned depth = 0;
     for (Node* parent = node->parentOrShadowHostNode(); parent; parent = parent->parentOrShadowHostNode())
         ++depth;
     return depth;
 }
 
 #endif
@@ skipping 2030 matching lines @@
             resultEnd = collapseTo;
             return;
         }
     }
 
     CharacterIterator computeRangeIterator(inputStart, inputEnd, iteratorFlagsForFindPlainText);
     calculateCharacterSubrange(computeRangeIterator, matchStart, matchLength, resultStart, resultEnd);
 }
 
 }