Since Bug 1108728 fix, dormant specific status was removed from MediaDecoder. But MediaDecoder::SetDormantIfNecessary() is still doing dormant dependent status change to MediaDecoder. It is necessary to be removed from MediaDecoder.

(In reply to Sotaro Ikeda [:sotaro] from comment #0) > Since Bug 1108728 fix, dormant specific status was removed from > MediaDecoder. But MediaDecoder::SetDormantIfNecessary() is still doing > dormant dependent status change to MediaDecoder. It is necessary to be > removed from MediaDecoder. When the status change is simply removed from MediaDecoder::SetDormantIfNecessary(), the following redundant function calls during resuming from dormant cause incorrect state transition. - MediaDecoder::FirstFrameLoaded() - MediaDecoder::SeekingStoppedAtEnd() - MediaDecoder::SeekingStopped()

After some investigations, I recognized that MediaDecoder could not be independent from dormant state of MediaDecoderStateMachine. When MediaDecoderStateMachine is in dormant state, MediaDecoder can not change it's state ChangeState(PLAY_STATE_LOADING) realize it. Until file is loaded again, MediaDecoder::mNextState stores status change.

Set to WONTFIX based on Comment 2.