Implement fuzzing of VP9 depacketization.

webrtc/test/fuzzers/webrtc_fuzzer_main.cc

+/*
+ *  Copyright (c) 2015 The WebRTC project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+#include "webrtc/base/logging.h"
+
+// This file is intended to provide a common interface for fuzzing functions, so
+// whether we're running fuzzing under libFuzzer or DrFuzz the webrtc functions
+// can remain the same.
+// TODO(pbos): Implement FuzzOneInput() for more than one platform (currently
+// libFuzzer).
+
+namespace webrtc {
+extern void FuzzOneInput(const uint8_t* data, size_t size);
+}  // namespace webrtc
+
+extern "C" int LLVMFuzzerTestOneInput(const unsigned char *data, size_t size) {
+  // TODO(pbos): Figure out whether this can be moved to common startup code and
+  // not be done per-input.
+  // Remove default logging to prevent huge slowdowns.
+  rtc::LogMessage::LogToDebug(rtc::LS_NONE);
+  webrtc::FuzzOneInput(data, size);
+  return 0;
+}