media: Add media pipeline fuzzer test.

testing/libfuzzer/fuzzers/media_pipeline_fuzzer.cc

+// Copyright 2016 The Chromium Authors. All rights reserved.

[xhwang, 2016/03/02 00:57:04]

What's the recommendation about the location of this file? Shall I put it here
so it's together with all fuzzer tests, or shall I put it in media/ same as
jrummell@ did for media/base/container_names_fuzzertest.cc?

[kcc2, 2016/03/02 01:00:11]

My recommendation is to keep the fuzzing targets closer to their code (i.e. in
media/)

[xhwang, 2016/03/02 01:20:41]

Done.

+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "base/at_exit.h"
+#include "base/command_line.h"
+#include "base/logging.h"
+#include "media/base/pipeline_status.h"
+#include "media/test/pipeline_integration_test_base.h"
+
+// Entry point for LibFuzzer.
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
+  // Media pipeline starts new threads, which needs AtExitManager.
+  base::AtExitManager at_exit;
+
+  // Media pipeline checks command line arguments internally.
+  base::CommandLine::Init(0, NULL);

[DaleCurtis, 2016/03/02 01:05:39]

nullptr ?

[xhwang, 2016/03/02 01:20:41]

Done.

+
+  media::PipelineIntegrationTestBase test;
+
+  DVLOG(1) << "Start";

[kcc2, 2016/03/02 01:00:11]

No logging please -- it just slows down fuzzing. 

[xhwang, 2016/03/02 01:20:41]

Done.

+  media::PipelineStatus pipeline_status =
+      test.Start(data, size, media::PipelineIntegrationTestBase::kClockless);
+  if (pipeline_status != media::PIPELINE_OK)
+    return 0;
+
+  DVLOG(1) << "Play";
+  test.Play();
+  pipeline_status = test.WaitUntilEndedOrError();
+  if (pipeline_status != media::PIPELINE_OK)
+    return 0;
+
+  DVLOG(1) << "Seek";
+  test.Seek(base::TimeDelta::FromMilliseconds(0));

[DaleCurtis, 2016/03/02 01:05:39]

Also just base::TimeDelta() here.

[xhwang, 2016/03/02 01:20:41]

Done.

+
+  return 0;
+}