Reenable test_progress1 to see if it passes now

content/media/video/test/Makefile.in

@@ -67,6 +67,7 @@ _TEST_FILES += \
 		test_ended1.html \
 		test_ended2.html \
 		test_onloadedmetadata.html \
+		test_progress1.html \
 		test_progress3.html \
 		test_seek1.html \
 		test_seek3.html \
@@ -84,7 +85,6 @@ _TEST_FILES += \
 		bug461281.ogg \
 		seek.ogv \
 		$(NULL)
-#		test_progress1.html    disabled while we figure out the random failure
 else
 _TEST_FILES += \
 		test_can_play_type_no_ogg.html \