Backout b3a8618f901c (bug 829042), 34a9ef8f929d (bug 822933), 4c1215cefbab (bug 826349), 70bb7f775178 (bug 825325), e9c8447fb197 (bug 828713), eb6ebf01eafe (bug 828901), f1f3ef647920 (bug 825329), f9d7b5722d4f (bug 825329), 5add564d4546 (bug 819377), 55e93d1fa972 (bug 804875), f14639a3461e (bug 804875), 23456fc21052 (bug 814308) for Windows pgo-only mochitest-1 media test timeouts on a CLOSED TREE