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

third_party/WebKit/Source/core/css/parser/MediaQueryBlockWatcher.cpp

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "core/css/parser/MediaQueryBlockWatcher.h"
 
 #include "core/css/parser/CSSParserToken.h"
 
 namespace blink {
 
 MediaQueryBlockWatcher::MediaQueryBlockWatcher() : m_blockLevel(0) {}
 
 void MediaQueryBlockWatcher::handleToken(const CSSParserToken& token) {
   if (token.getBlockType() == CSSParserToken::BlockStart) {
     ++m_blockLevel;
   } else if (token.getBlockType() == CSSParserToken::BlockEnd) {
-    ASSERT(m_blockLevel);
+    DCHECK(m_blockLevel);
     --m_blockLevel;
   }
 }
 
 }  // namespace blink