Backed out changeset 1d5db5f16a32 (bug 874669) for failures in test_bug716822.html
Bug 845162 - Disable test_playback.html and test_seek.html on Android for too many intermittent failures
Backed out changeset 7f9cf2a04252 (bug 828088) for near-permaorange metro test runs
Bug 883126 - Improve performance of EXIDX unwinding in Breakpad.  r=ted