Convert MediaLog from being ref counted to owned by WebMediaPlayer.

testing/libfuzzer/fuzzers/es_parser_mpeg1audio_fuzzer.cc

Index: testing/libfuzzer/fuzzers/es_parser_mpeg1audio_fuzzer.cc
diff --git a/testing/libfuzzer/fuzzers/es_parser_mpeg1audio_fuzzer.cc b/testing/libfuzzer/fuzzers/es_parser_mpeg1audio_fuzzer.cc
index 94b8a60c5aa29749f629d3c028c52f0b2aa264fb..7625f1fae1fa5c0288118920c26cfa023afcd16e 100644
--- a/testing/libfuzzer/fuzzers/es_parser_mpeg1audio_fuzzer.cc
+++ b/testing/libfuzzer/fuzzers/es_parser_mpeg1audio_fuzzer.cc
@@ -29,9 +29,9 @@ 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);
+  NullMediaLog media_log;
+  media::mp2t::EsParserMpeg1Audio es_parser(
+      base::Bind(&NewAudioConfig), base::Bind(&EmitBuffer), &media_log);
   if (!es_parser.Parse(data, size, media::kNoTimestamp,
                        media::kNoDecodeTimestamp())) {
     return 0;