Revert of Send a SIGKILL to masters after 10 seconds if they don't exit from SIGTERM

scripts/master/kill_pidfile.sh

-#!/bin/sh
-# Copyright (c) 2016 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.
-
-# Sends a SIGTERM to a process whose PID is read from a pidfile.  Waits 10
-# seconds for it to exit and then sends a SIGKILL.
-
-set -e
-
-pidfile="$1"
-
-if [ -z "$pidfile" ]; then
-  echo "Usage: $0 pidfile"
-  exit 1
-fi
-
-if [ ! -e "$pidfile" ]; then
-  echo "Pidfile $pidfile does not exist"
-  exit 0
-fi
-
-pid=$(cat $pidfile)
-pgid=$(ps h -o pgid= $pid | awk '{print $1}')
-
-echo "Sending SIGTERM to PGID $pgid"
-kill -TERM -$pgid
-
-# Wait 10 seconds for it to exit.
-for i in $(seq 100); do
-  if ! ps -p $pid > /dev/null; then
-    exit 0
-  fi
-  sleep 0.1
-done
-
-echo "Sending SIGKILL to PGID $pgid"
-kill -KILL -$pgid