Upgrade the windows specific version of LaunchProcess to avoid raw handles.

base/process/kill.h

 // Copyright (c) 2013 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.
 
 // This file contains routines to kill processes and get the exit code and
 // termination status.
 
 #ifndef BASE_PROCESS_KILL_H_
 #define BASE_PROCESS_KILL_H_
 
 #include "base/files/file_path.h"
+#include "base/process/process.h"
 #include "base/process/process_handle.h"
 #include "base/time/time.h"
 
 namespace base {
 
 class ProcessFilter;
 
 // Return status values from GetTerminationStatus.  Don't use these as
 // exit code arguments to KillProcess*(), use platform/application
 // specific values instead.
@@ skipping 117 matching lines @@
 // then it closes the given process handle.
 //
 // It assumes that the process has already been signalled to exit, and it
 // begins by waiting a small amount of time for it to exit.  If the process
 // does not appear to have exited, then this function starts to become
 // aggressive about ensuring that the process terminates.
 //
 // On Linux this method does not block the calling thread.
 // On OS X this method may block for up to 2 seconds.
 //
-// NOTE: The process handle must have been opened with the PROCESS_TERMINATE
-// and SYNCHRONIZE permissions.
+// NOTE: The process must have been opened with the PROCESS_TERMINATE and
+// SYNCHRONIZE permissions.
 //
-BASE_EXPORT void EnsureProcessTerminated(ProcessHandle process_handle);
+BASE_EXPORT void EnsureProcessTerminated(Process process);
 
 #if defined(OS_POSIX) && !defined(OS_MACOSX)
 // The nicer version of EnsureProcessTerminated() that is patient and will
 // wait for |process_handle| to finish and then reap it.
 BASE_EXPORT void EnsureProcessGetsReaped(ProcessHandle process_handle);
 #endif
 
 }  // namespace base
 
 #endif  // BASE_PROCESS_KILL_H_