Replace ENABLE(ASSERT) with DCHECK_IS_ON().

third_party/WebKit/Source/modules/accessibility/AXObjectCacheImpl.h

 /*
  * Copyright (C) 2014, 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:
  *
  * 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 190 matching lines @@
   HeapHashMap<AXID, Member<AXObject>> m_objects;
   // LayoutObject and AbstractInlineTextBox are not on the Oilpan heap so we
   // do not use HeapHashMap for those mappings.
   HashMap<LayoutObject*, AXID> m_layoutObjectMapping;
   HeapHashMap<Member<Node>, AXID> m_nodeObjectMapping;
   HashMap<AbstractInlineTextBox*, AXID> m_inlineTextBoxObjectMapping;
   int m_modificationCount;
 
   HashSet<AXID> m_idsInUse;
 
-#if ENABLE(ASSERT)
+#if DCHECK_IS_ON()
   // Verified when finalizing.
-  bool m_hasBeenDisposed;
+  bool m_hasBeenDisposed = false;
 #endif
 
   //
   // Aria-owns
   //
 
   // Map from the AXID of the owner to the AXIDs of the children.
   // This is a validated map, it doesn't contain illegal, duplicate,
   // or cyclical matches, or references to IDs that don't exist.
   HashMap<AXID, Vector<AXID>> m_ariaOwnerToChildrenMapping;
@@ skipping 35 matching lines @@
 // This is the only subclass of AXObjectCache.
 DEFINE_TYPE_CASTS(AXObjectCacheImpl, AXObjectCache, cache, true, true);
 
 bool nodeHasRole(Node*, const String& role);
 // This will let you know if aria-hidden was explicitly set to false.
 bool isNodeAriaVisible(Node*);
 
 }  // namespace blink
 
 #endif