Update from https://crrev.com/320931

base/test/launcher/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/launcher/test_launcher.h"
 
 #if defined(OS_POSIX)
 #include <fcntl.h>
 #endif
 
@@ skipping 365 matching lines @@
                           FILE_ATTRIBUTE_TEMPORARY,
                           NULL));
     CHECK(handle.IsValid());
     options.inherit_handles = true;
     options.stdin_handle = INVALID_HANDLE_VALUE;
     options.stdout_handle = handle.Get();
     options.stderr_handle = handle.Get();
   }
 #elif defined(OS_POSIX)
   options.new_process_group = true;
+#if defined(OS_LINUX)
+  options.kill_on_parent_death = true;
+#endif  // defined(OS_LINUX)
 
   FileHandleMappingVector fds_mapping;
   ScopedFD output_file_fd;
 
   if (redirect_stdio) {
     output_file_fd.reset(open(output_file.value().c_str(), O_RDWR));
     CHECK(output_file_fd.is_valid());
 
     fds_mapping.push_back(std::make_pair(output_file_fd.get(), STDOUT_FILENO));
     fds_mapping.push_back(std::make_pair(output_file_fd.get(), STDERR_FILENO));
@@ skipping 682 matching lines @@
   }
 
   std::string snippet(full_output.substr(run_pos));
   if (end_pos != std::string::npos)
     snippet = full_output.substr(run_pos, end_pos - run_pos);
 
   return snippet;
 }
 
 }  // namespace base