Fix bug where DeterministicDispatcher CHECKed for killed jobs

headless/public/util/deterministic_dispatcher_test.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 "headless/public/util/deterministic_dispatcher.h"
 
 #include <memory>
 #include <string>
 #include <vector>
 
@@ skipping 92 matching lines @@
   base::RunLoop().RunUntilIdle();
   EXPECT_THAT(notifications,
               ElementsAre("id: 1 OK", "id: 2 OK", "id: 3 err: -123"));
 
   job3.reset();
   base::RunLoop().RunUntilIdle();
   EXPECT_THAT(notifications, ElementsAre("id: 1 OK", "id: 2 OK",
                                          "id: 3 err: -123", "id: 4 OK"));
 }
 
+TEST_F(DeterministicDispatcherTest, JobKilled) {
+  std::vector<std::string> notifications;
+  {
+    std::unique_ptr<FakeManagedDispatchURLRequestJob> job(
+        new FakeManagedDispatchURLRequestJob(deterministic_dispatcher_.get(), 1,
+                                             &notifications));
+
+    job->Kill();
+  }
+
+  EXPECT_TRUE(notifications.empty());
+
+  base::RunLoop().RunUntilIdle();
+  EXPECT_TRUE(notifications.empty());
+}
+
 }  // namespace headless