Add fuzzer for usb_midi_descriptor_parser.

Change-Id: I56f11fa5e877f64a42139d584fe6fcd5a8030fdd
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1855619
Commit-Queue: Oliver Chang <ochang@chromium.org>
Reviewed-by: Yutaka Hirano <yhirano@chromium.org>
Reviewed-by: Takashi Toyoshima <toyoshim@chromium.org>
Cr-Commit-Position: refs/heads/master@{#705034}

media/midi/BUILD.gn

@@ -240,3 +240,13 @@ fuzzer_test("midi_message_queue_fuzzer") {
     ":midi",
   ]
 }
+
+fuzzer_test("usb_midi_descriptor_parser_fuzzer") {
+  sources = [ "usb_midi_descriptor_parser_fuzzer.cc" ] + usb_midi_sources
+  seed_corpus = "fuzz/usb_midi_descriptor_corpus"
+  deps = [
+    ":midi",
+    ":mojo",
+    "//base",
+  ]
+}

media/midi/fuzz/usb_midi_descriptor_corpus/a

+
\ No newline at end of file

media/midi/usb_midi_descriptor_parser_fuzzer.cc

+// Copyright 2017 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 "media/midi/usb_midi_descriptor_parser.h"
+
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
+  midi::UsbMidiDescriptorParser parser;
+  std::vector<midi::UsbMidiJack> jacks;
+  parser.Parse(nullptr, data, size, &jacks);
+
+  return 0;
+}