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

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

 /*
  * Copyright (C) 2009 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
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 30 matching lines @@
     return view->mediaType();
 
   return nullAtom;
 }
 
 bool StyleMedia::matchMedium(const String& query) const {
   if (!frame())
     return false;
 
   Document* document = frame()->document();
-  ASSERT(document);
+  DCHECK(document);
   Element* documentElement = document->documentElement();
   if (!documentElement)
     return false;
 
   MediaQuerySet* media = MediaQuerySet::create();
   if (!media->set(query))
     return false;
 
   MediaQueryEvaluator screenEval(frame());
   return screenEval.eval(media);
 }
 
 DEFINE_TRACE(StyleMedia) {
   ContextClient::trace(visitor);
 }
 
 }  // namespace blink