Replace ENABLE(ASSERT) with DCHECK_IS_ON().

third_party/WebKit/Source/core/html/parser/HTMLTreeBuilder.cpp

 /*
  * Copyright (C) 2010 Google, Inc. All Rights Reserved.
  * Copyright (C) 2011, 2014 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 202 matching lines @@
   RefPtr<StringImpl> m_characters;
   unsigned m_current;
   unsigned m_end;
 };
 
 HTMLTreeBuilder::HTMLTreeBuilder(HTMLDocumentParser* parser,
                                  Document& document,
                                  ParserContentPolicy parserContentPolicy,
                                  const HTMLParserOptions& options)
     : m_framesetOk(true),
-#if ENABLE(ASSERT)
-      m_isAttached(true),
-#endif
       m_tree(parser->reentryPermit(), document, parserContentPolicy),
       m_insertionMode(InitialMode),
       m_originalInsertionMode(InitialMode),
       m_shouldSkipLeadingNewline(false),
       m_parser(parser),
       m_scriptToProcessStartPosition(uninitializedPositionValue1()),
       m_options(options) {
 }
 
 HTMLTreeBuilder::HTMLTreeBuilder(HTMLDocumentParser* parser,
@@ skipping 40 matching lines @@
 }
 
 DEFINE_TRACE(HTMLTreeBuilder) {
   visitor->trace(m_fragmentContext);
   visitor->trace(m_tree);
   visitor->trace(m_parser);
   visitor->trace(m_scriptToProcess);
 }
 
 void HTMLTreeBuilder::detach() {
-#if ENABLE(ASSERT)
+#if DCHECK_IS_ON()
   // This call makes little sense in fragment mode, but for consistency
   // DocumentParser expects detach() to always be called before it's destroyed.
   m_isAttached = false;
 #endif
   // HTMLConstructionSite might be on the callstack when detach() is called
   // otherwise we'd just call m_tree.clear() here instead.
   m_tree.detach();
 }
 
 Element* HTMLTreeBuilder::takeScriptToProcess(
@@ skipping 2461 matching lines @@
     DEFINE_STRINGIFY(AfterFramesetMode)
     DEFINE_STRINGIFY(AfterAfterBodyMode)
     DEFINE_STRINGIFY(AfterAfterFramesetMode)
 #undef DEFINE_STRINGIFY
   }
   return "<unknown>";
 }
 #endif
 
 }  // namespace blink