Disable test for bug 503473 due to disruption to test harness shutdown (orange).

content/base/test/Makefile.in

@@ -245,8 +245,6 @@ _TEST_FILES = 	test_bug5141.html \
 		test_bug505783.html \
 		test_bug457746.html \
 		test_bug518104.html \
-		test_bug503473.html \
-		file_bug503473-frame.sjs \
 		bug457746.sjs \
 		test_CrossSiteXHR.html \
 		file_CrossSiteXHR_inner.html \
@@ -340,5 +338,9 @@ _TEST_FILES = 	test_bug5141.html \
 # test_bug444546.html \
 # bug444546.sjs \
 
+# Disabled due to making the harness time out
+#		test_bug503473.html \
+#		file_bug503473-frame.sjs \
+
 libs:: $(_TEST_FILES)
 	$(INSTALL) $(foreach f,$^,"$f") $(DEPTH)/_tests/testing/mochitest/tests/$(relativesrcdir)