Update from https://crrev.com/333737

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.
 enum TerminationStatus {
   TERMINATION_STATUS_NORMAL_TERMINATION,   // zero exit status
   TERMINATION_STATUS_ABNORMAL_TERMINATION, // non-zero exit status
   TERMINATION_STATUS_PROCESS_WAS_KILLED,   // e.g. SIGKILL or task manager kill
   TERMINATION_STATUS_PROCESS_CRASHED,      // e.g. Segmentation fault
   TERMINATION_STATUS_STILL_RUNNING,        // child hasn't exited yet
+#if defined(OS_CHROMEOS)
+  // Used for the case when oom-killer kills a process on ChromeOS.
+  TERMINATION_STATUS_PROCESS_WAS_KILLED_BY_OOM,
+#endif
 #if defined(OS_ANDROID)
   // On Android processes are spawned from the system Zygote and we do not get
   // the termination status.  We can't know if the termination was a crash or an
   // oom kill for sure, but we can use status of the strong process bindings as
   // a hint.
   TERMINATION_STATUS_OOM_PROTECTED,        // child was protected from oom kill
 #endif
   TERMINATION_STATUS_MAX_ENUM
 };
 
@@ skipping 81 matching lines @@
 
 #if defined(OS_POSIX) && !defined(OS_MACOSX)
 // The nicer version of EnsureProcessTerminated() that is patient and will
 // wait for |pid| to finish and then reap it.
 BASE_EXPORT void EnsureProcessGetsReaped(ProcessId pid);
 #endif
 
 }  // namespace base
 
 #endif  // BASE_PROCESS_KILL_H_