back out bustage fixes

modules/plugin/test/mochitest/Makefile.in

@@ -44,8 +44,7 @@ relativesrcdir  = modules/plugin/test
 include $(DEPTH)/config/autoconf.mk
 include $(topsrcdir)/config/rules.mk
 
-# Test disabled for now due to leaks.
-#_TEST_FILES =	test_npruntime.xul
+_TEST_FILES =	test_npruntime.xul
 
-#libs:: $(_TEST_FILES)
-#	$(INSTALL) $^ $(DEPTH)/_tests/testing/mochitest/chrome/$(relativesrcdir)
+libs:: $(_TEST_FILES)
+	$(INSTALL) $^ $(DEPTH)/_tests/testing/mochitest/chrome/$(relativesrcdir)