Fix bug where DeterministicDispatcher CHECKed for killed jobs

headless/public/util/testing/fake_managed_dispatch_url_request_job.h

 // 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.
 
 #ifndef HEADLESS_PUBLIC_UTIL_TESTING_FAKE_MANAGED_DISPATCH_URL_REQUEST_JOB_H_
 #define HEADLESS_PUBLIC_UTIL_TESTING_FAKE_MANAGED_DISPATCH_URL_REQUEST_JOB_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 13 matching lines @@
                                    std::vector<std::string>* notifications)
       : ManagedDispatchURLRequestJob(nullptr, nullptr, url_request_dispatcher),
         id_(id),
         notifications_(notifications) {}
 
   ~FakeManagedDispatchURLRequestJob() override {}
 
   using ManagedDispatchURLRequestJob::DispatchHeadersComplete;
   using ManagedDispatchURLRequestJob::DispatchStartError;
 
+  void Kill() override;
+
   void Start() override {}
 
   void OnHeadersComplete() override;
 
   void OnStartError(net::Error error) override;
 
  private:
   int id_;
   std::vector<std::string>* notifications_;  // NOT OWNED
 
   DISALLOW_COPY_AND_ASSIGN(FakeManagedDispatchURLRequestJob);
 };
 
 }  // namespace headless
 
 #endif  // HEADLESS_PUBLIC_UTIL_TESTING_FAKE_MANAGED_DISPATCH_URL_REQUEST_JOB_H_