Update from https://crrev.com/320931

base/process/launch.h

Index: base/process/launch.h
diff --git a/base/process/launch.h b/base/process/launch.h
index 775e65c7fed2fbd54ec69c8e87c4e9f240025da6..56f27a8210989ec599359f8fa4722f985099b663 100644
--- a/base/process/launch.h
+++ b/base/process/launch.h
@@ -141,6 +141,9 @@ struct BASE_EXPORT LaunchOptions {
   // By default, child processes will have the PR_SET_NO_NEW_PRIVS bit set. If
   // true, then this bit will not be set in the new child process.
   bool allow_new_privs;
+
+  // Sets parent process death signal to SIGKILL.
+  bool kill_on_parent_death;
 #endif  // defined(OS_LINUX)
 
 #if defined(OS_POSIX)