Implement fuzzing of VP9 depacketization.

webrtc/test/BUILD.gn

 # Copyright (c) 2014 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.
 
 # TODO(kjellander): Convert the rest of the test.gyp targets and put here.
 
@@ skipping 87 matching lines @@
     ":histogram",
     ":test_support",
     "//testing/gmock",
     "//testing/gtest",
     "//third_party/gflags",
   ]
 
   configs += [ "..:common_config" ]
   public_configs = [ "..:common_inherited_config" ]
 }
+
+if (use_libfuzzer) {
+  group("webrtc_fuzzers") {
+    testonly = true
+    deps = [
+      "fuzzers:vp9_depacketizer_fuzzer",
+    ]
+  }
+}