Convert media constants to constexpr.

testing/libfuzzer/fuzzers/es_parser_mpeg1audio_fuzzer.cc

 // Copyright 2015 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 <stddef.h>
 #include <stdint.h>
 
 #include <memory>
 
 #include "base/bind.h"
@@ skipping 14 matching lines @@
 };
 
 static void NewAudioConfig(const media::AudioDecoderConfig& config) {}
 static void EmitBuffer(scoped_refptr<media::StreamParserBuffer> buffer) {}
 
 // Entry point for LibFuzzer.
 extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
   scoped_refptr<NullMediaLog> media_log(new NullMediaLog());
   media::mp2t::EsParserMpeg1Audio es_parser(base::Bind(&NewAudioConfig),
                                             base::Bind(&EmitBuffer), media_log);
-  if (!es_parser.Parse(data, size, media::kNoTimestamp(),
+  if (!es_parser.Parse(data, size, media::kNoTimestamp,
                        media::kNoDecodeTimestamp())) {
     return 0;
   }
   es_parser.Flush();
   return 0;
 }