Update from https://crrev.com/308331

base/process/process_posix.cc

 // Copyright (c) 2011 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/process.h"
 
 #include <sys/resource.h>
 #include <sys/time.h>
 #include <sys/types.h>
 
@@ skipping 71 matching lines @@
 }
 
 void Process::Terminate(int result_code) {
   // result_code isn't supportable.
   DCHECK(IsValid());
   // We don't wait here. It's the responsibility of other code to reap the
   // child.
   KillProcess(process_, result_code, false);
 }
 
+bool Process::WaitForExit(int* exit_code) {
+  // TODO(rvargas) crbug.com/417532: Remove this constant.
+  const int kNoTimeout = -1;
+  return WaitForExitWithTimeout(TimeDelta::FromMilliseconds(kNoTimeout),
+                                exit_code);
+}
+
+bool Process::WaitForExitWithTimeout(TimeDelta timeout, int* exit_code) {
+  // TODO(rvargas) crbug.com/417532: Move the implementation here.
+  return base::WaitForExitCodeWithTimeout(Handle(), exit_code, timeout);
+}
+
 #if !defined(OS_LINUX)
 bool Process::IsProcessBackgrounded() const {
   // See SetProcessBackgrounded().
   DCHECK(IsValid());
   return false;
 }
 
 bool Process::SetProcessBackgrounded(bool value) {
   // POSIX only allows lowering the priority of a process, so if we
   // were to lower it we wouldn't be able to raise it back to its initial
   // priority.
   DCHECK(IsValid());
   return false;
 }
 #endif  // !defined(OS_LINUX)
 
 int Process::GetPriority() const {
   DCHECK(IsValid());
   return getpriority(PRIO_PROCESS, process_);
 }
 
 }  // namspace base