Allow assertions to be enabled in Blink Release builds.

Source/core/rendering/FastTextAutosizer.h

 /*
  * Copyright (C) 2013 Google 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 202 matching lines @@
         // Returns true if any BlockSet was modified or freed by the removal.
         bool remove(const RenderObject*);
         Fingerprint get(const RenderObject*);
         BlockSet& getTentativeClusterRoots(Fingerprint);
     private:
         typedef HashMap<const RenderObject*, Fingerprint> FingerprintMap;
         typedef HashMap<Fingerprint, OwnPtr<BlockSet> > ReverseFingerprintMap;
 
         FingerprintMap m_fingerprints;
         ReverseFingerprintMap m_blocksForFingerprint;
-#ifndef NDEBUG
+#if ENABLE(ASSERT)
         void assertMapsAreConsistent();
 #endif
     };
 
     struct PageInfo {
         PageInfo()
             : m_frameWidth(0)
             , m_layoutWidth(0)
             , m_baseMultiplier(0)
             , m_pageNeedsAutosizing(false)
@@ skipping 48 matching lines @@
     // from descendant clusters but because descendant clusters may not exist, this is only an approximation.
     // The TraversalDirection controls whether we return the first or the last text leaf.
     const RenderObject* findTextLeaf(const RenderObject*, size_t&, TextLeafSearch);
     BlockFlags classifyBlock(const RenderObject*, BlockFlags mask = UINT_MAX);
 #ifdef AUTOSIZING_DOM_DEBUG_INFO
     void writeClusterDebugInfo(Cluster*);
 #endif
 
     const Document* m_document;
     const RenderBlock* m_firstBlockToBeginLayout;
-#ifndef NDEBUG
+#if ENABLE(ASSERT)
     BlockSet m_blocksThatHaveBegunLayout; // Used to ensure we don't compute properties of a block before beginLayout() is called on it.
 #endif
 
     // Clusters are created and destroyed during layout. The map key is the
     // cluster root. Clusters whose roots share the same fingerprint use the
     // same multiplier.
     SuperclusterMap m_superclusters;
     ClusterStack m_clusterStack;
     FingerprintMapper m_fingerprintMapper;
     Vector<RefPtr<RenderStyle> > m_stylesRetainedDuringLayout;
     // FIXME: All frames should share the same m_pageInfo instance.
     PageInfo m_pageInfo;
     bool m_updatePageInfoDeferred;
 };
 
 } // namespace WebCore
 
 #endif // FastTextAutosizer_h