GTTF: kill spawned test processes when the launcher is killed

base/test/unit_test_launcher.cc

 // Copyright 2013 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 "base/test/unit_test_launcher.h"
 
 #include "base/bind.h"
 #include "base/callback_helpers.h"
 #include "base/command_line.h"
 #include "base/compiler_specific.h"
@@ skipping 320 matching lines @@
     return 1;
 
   fprintf(stdout,
           "Starting tests (using %d parallel jobs)...\n"
           "IMPORTANT DEBUGGING NOTE: batches of tests are run inside their\n"
           "own process. For debugging a test inside a debugger, use the\n"
           "--gtest_filter=<your_test_name> flag along with\n"
           "--single-process-tests.\n", jobs);
   fflush(stdout);
 
-  MessageLoop message_loop;
+  MessageLoopForIO message_loop;
 
   base::UnitTestLauncherDelegate delegate(jobs, batch_limit);
   int exit_code = base::LaunchTests(&delegate, argc, argv);
 
   fprintf(stdout,
           "Tests took %" PRId64 " seconds.\n",
           (base::TimeTicks::Now() - start_time).InSeconds());
   fflush(stdout);
 
   return exit_code;
 }
 
 }  // namespace base