Add infrastructure for skipping tests in GC stress mode.

test/mjsunit/osr-elements-kind.js

Index: test/mjsunit/osr-elements-kind.js
diff --git a/test/mjsunit/osr-elements-kind.js b/test/mjsunit/osr-elements-kind.js
index af4b5ec9f180d39b5b1823d02886da63acfcb053..2ad3c4348731e8886aed8023168c342b349741d8 100644
--- a/test/mjsunit/osr-elements-kind.js
+++ b/test/mjsunit/osr-elements-kind.js
@@ -39,11 +39,6 @@
 // in this test case.  Depending on whether smi-only arrays are actually
 // enabled, this test takes the appropriate code path to check smi-only arrays.
 
-// Reset the GC stress mode to be off. Needed because AllocationMementos only
-// live for one gc, so a gc that happens in certain fragile areas of the test
-// can break assumptions.
-%SetFlags("--gc-interval=-1")
-
 support_smi_only_arrays = %HasFastSmiElements(new Array(1,2,3,4,5,6,7,8));
 
 if (support_smi_only_arrays) {