Replace ASSERT, ASSERT_NOT_REACHED, and RELEASE_ASSERT in core/css/

third_party/WebKit/Source/core/css/CSSPageRule.cpp

 /*
  * (C) 1999-2003 Lars Knoll (knoll@kde.org)
  * (C) 2002-2003 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2002, 2005, 2006, 2008, 2012 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
@@ skipping 67 matching lines @@
   result.append("{ ");
   String decls = m_pageRule->properties().asText();
   result.append(decls);
   if (!decls.isEmpty())
     result.append(' ');
   result.append('}');
   return result.toString();
 }
 
 void CSSPageRule::reattach(StyleRuleBase* rule) {
-  ASSERT(rule);
+  DCHECK(rule);
   m_pageRule = toStyleRulePage(rule);
   if (m_propertiesCSSOMWrapper)
     m_propertiesCSSOMWrapper->reattach(m_pageRule->mutableProperties());
 }
 
 DEFINE_TRACE(CSSPageRule) {
   visitor->trace(m_pageRule);
   visitor->trace(m_propertiesCSSOMWrapper);
   CSSRule::trace(visitor);
 }
 
 }  // namespace blink