Update from https://crrev.com/306655

base/process/launch_posix.cc

Index: base/process/launch_posix.cc
diff --git a/base/process/launch_posix.cc b/base/process/launch_posix.cc
index bc6294b2dad1b22e5c026aaa352ead68c2494916..3322d265785246e8076e8ddd9591701f57db7f5c 100644
--- a/base/process/launch_posix.cc
+++ b/base/process/launch_posix.cc
@@ -480,6 +480,15 @@ bool LaunchProcess(const CommandLine& cmdline,
   return LaunchProcess(cmdline.argv(), options, process_handle);
 }
 
+Process LaunchProcess(const CommandLine& cmdline,
+                      const LaunchOptions& options) {
+  ProcessHandle process_handle;
+  if (LaunchProcess(cmdline, options, &process_handle))
+    return Process(process_handle);
+
+  return Process();
+}
+
 void RaiseProcessToHighPriority() {
   // On POSIX, we don't actually do anything here.  We could try to nice() or
   // setpriority() or sched_getscheduler, but these all require extra rights.