http://crosbug.com/16450

prevent OOM killer by default

--- a/init/job_class.h
+++ b/init/job_class.h
@@ -108,7 +108,7 @@
  *
  * The default OOM score adjustment for processes.
  **/
-#define JOB_DEFAULT_OOM_SCORE_ADJ 0
+#define JOB_DEFAULT_OOM_SCORE_ADJ -1000
 
 /**
  * JOB_DEFAULT_ENVIRONMENT:
--- a/init/tests/test_job_class.c
+++ b/init/tests/test_job_class.c
@@ -134,7 +134,7 @@ test_new (void)
 
 		TEST_EQ (class->umask, 022);
 		TEST_EQ (class->nice, 0);
-		TEST_EQ (class->oom_score_adj, 0);
+		TEST_EQ (class->oom_score_adj, -1000);
 
 		for (i = 0; i < RLIMIT_NLIMITS; i++)
 			TEST_EQ_P (class->limits[i], NULL);