Implement fuzzing of VP9 depacketization.

webrtc/test/fuzzers/vp9_depacketizer_fuzzer.cc

Index: webrtc/test/fuzzers/vp9_depacketizer_fuzzer.cc
diff --git a/webrtc/modules/audio_coding/codecs/isac/fix/source/audio_decoder_isacfix.cc b/webrtc/test/fuzzers/vp9_depacketizer_fuzzer.cc
similarity index 64%
copy from webrtc/modules/audio_coding/codecs/isac/fix/source/audio_decoder_isacfix.cc
copy to webrtc/test/fuzzers/vp9_depacketizer_fuzzer.cc
index 45eefb913b80ad4b87e83f7364e9e00baac450cb..02a7cc0f813be76e831375a1755451a3a9e63664 100644
--- a/webrtc/modules/audio_coding/codecs/isac/fix/source/audio_decoder_isacfix.cc
+++ b/webrtc/test/fuzzers/vp9_depacketizer_fuzzer.cc
@@ -7,14 +7,12 @@
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
-
-#include "webrtc/modules/audio_coding/codecs/isac/fix/include/audio_decoder_isacfix.h"
-
-#include "webrtc/modules/audio_coding/codecs/isac/audio_decoder_isac_t_impl.h"
+#include "webrtc/modules/rtp_rtcp/source/rtp_format_vp9.h"
 
 namespace webrtc {
-
-// Explicit instantiation:
-template class AudioDecoderIsacT<IsacFix>;
-
+void FuzzOneInput(const uint8_t* data, size_t size) {
+  RtpDepacketizerVp9 depacketizer;
+  RtpDepacketizer::ParsedPayload parsed_payload;
+  depacketizer.Parse(&parsed_payload, data, size);
+}
 }  // namespace webrtc