Add fuzzer for H264 bitstream parser.

webrtc/test/fuzzers/h264_bitstream_parser_fuzzer.cc

Index: webrtc/test/fuzzers/h264_bitstream_parser_fuzzer.cc
diff --git a/webrtc/test/fuzzers/audio_decoder_isac_incoming_packet_fuzzer.cc b/webrtc/test/fuzzers/h264_bitstream_parser_fuzzer.cc
similarity index 68%
copy from webrtc/test/fuzzers/audio_decoder_isac_incoming_packet_fuzzer.cc
copy to webrtc/test/fuzzers/h264_bitstream_parser_fuzzer.cc
index 9e490d3d4ad968a5fa0e81305bdd958e79e21d18..5661188b5d675ee3577c2217f0d86c6b1b1c0c98 100644
--- a/webrtc/test/fuzzers/audio_decoder_isac_incoming_packet_fuzzer.cc
+++ b/webrtc/test/fuzzers/h264_bitstream_parser_fuzzer.cc
@@ -7,13 +7,15 @@
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
+#include <stdint.h>
 
-#include "webrtc/modules/audio_coding/codecs/isac/main/include/audio_decoder_isac.h"
-#include "webrtc/test/fuzzers/audio_decoder_fuzzer.h"
+#include "webrtc/common_video/h264/h264_bitstream_parser.h"
 
 namespace webrtc {
 void FuzzOneInput(const uint8_t* data, size_t size) {
-  AudioDecoderIsac dec(16000);
-  FuzzAudioDecoderIncomingPacket(data, size, &dec);
+  H264BitstreamParser h264_bitstream_parser;
+  h264_bitstream_parser.ParseBitstream(data, size);
+  int qp;
+  h264_bitstream_parser.GetLastSliceQp(&qp);
 }
 }  // namespace webrtc