Update from https://crrev.com/333737

base/process/kill.h

Index: base/process/kill.h
diff --git a/base/process/kill.h b/base/process/kill.h
index af00b03d9849f73dea9b9e4fff3d0dd4d66239fa..dbd32e17058750b6238f75c4c7b46a8bfb18db0c 100644
--- a/base/process/kill.h
+++ b/base/process/kill.h
@@ -26,6 +26,10 @@ enum TerminationStatus {
   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