Remove useless DCHECK; discard helper enforces invalid values.

media/test/pipeline_integration_fuzzertest.cc

 // Copyright 2016 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 <vector>
 
 #include "base/at_exit.h"
 #include "base/bind.h"
@@ skipping 28 matching lines @@
   base::CommandLine::Init(0, nullptr);
 
   media::InitializeMediaLibrary();
 
   media::PipelineIntegrationTestBase test;
 
   test.set_encrypted_media_init_data_cb(
       base::Bind(&OnEncryptedMediaInitData, &test));
 
   media::PipelineStatus pipeline_status =
-      test.Start(data, size, media::PipelineIntegrationTestBase::kClockless);
+      test.Start(data, size,
+                 media::PipelineIntegrationTestBase::kClockless |
+                     media::PipelineIntegrationTestBase::kUnreliableDuration);
   if (pipeline_status != media::PIPELINE_OK)
     return 0;
 
   test.Play();
   pipeline_status = test.WaitUntilEndedOrError();
   if (pipeline_status != media::PIPELINE_OK)
     return 0;
 
   test.Seek(base::TimeDelta());
 
   return 0;
 }