Disable randomly-failing progress-event test

content/media/video/test/Makefile.in

@@ -67,7 +67,7 @@ _TEST_FILES += \
 		test_ended1.html \
 		test_ended2.html \
 		test_onloadedmetadata.html \
-		test_progress1.html \
+#		test_progress1.html \   disabled while we figure out the random failure
 		test_progress3.html \
 		test_seek1.html \
 		test_seek3.html \