Update from https://crrev.com/306655

base/process/launch_posix.cc

 // Copyright (c) 2012 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/process/launch.h"
 
 #include <dirent.h>
 #include <errno.h>
 #include <fcntl.h>
 #include <signal.h>
@@ skipping 462 matching lines @@
   return true;
 }
 
 
 bool LaunchProcess(const CommandLine& cmdline,
                    const LaunchOptions& options,
                    ProcessHandle* process_handle) {
   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.
 }
 
 // Return value used by GetAppOutputInternal to encapsulate the various exit
 // scenarios from the function.
 enum GetAppOutputInternalResult {
   EXECUTE_FAILURE,
   EXECUTE_SUCCESS,
@@ skipping 162 matching lines @@
                               std::string* output,
                               int* exit_code) {
   // Run |execve()| with the current environment and store "unlimited" data.
   GetAppOutputInternalResult result = GetAppOutputInternal(
       cl.argv(), NULL, output, std::numeric_limits<std::size_t>::max(), true,
       exit_code);
   return result == EXECUTE_SUCCESS;
 }
 
 }  // namespace base