https://bugs.webkit.org/show_bug.cgi?id=104593

Reviewed by Dean Jackson.

Source/WebCore:

Test: media/track/track-in-band-cues-added-once.html

* html/track/InbandTextTrack.cpp:
(WebCore::InbandTextTrack::hasCue): New.
* html/track/InbandTextTrack.h:

* html/track/TextTrackCue.cpp:
(WebCore::TextTrackCue::setCueSettings): Remember the raw cue settings so they can be accessed later.
* html/track/TextTrackCue.h:

* platform/graphics/InbandTextTrackPrivateClient.h: Declare hasCue.

* platform/graphics/avfoundation/InbandTextTrackPrivateAVF.cpp:
(WebCore::InbandTextTrackPrivateAVF::processCue): Early return if m_player has been cleared.
(WebCore::InbandTextTrackPrivateAVF::setMode): Ditto.

* platform/graphics/avfoundation/MediaPlayerPrivateAVFoundation.cpp:
(WebCore::MediaPlayerPrivateAVFoundation::seek): Clear the partially accumulated cue when the seek
    starts, not when it completes.
(WebCore::MediaPlayerPrivateAVFoundation::seekCompleted): Ditto.
(WebCore::MediaPlayerPrivateAVFoundation::flushCurrentCue): Don't add a cue if it is already in the
    text track cue list.
* platform/graphics/avfoundation/objc/MediaPlayerPrivateAVFoundationObjC.mm:
(WebCore::MediaPlayerPrivateAVFoundationObjC::clearTextTracks): Drive-by cleanup, clear the track list completely.

LayoutTests:

Test to ensure that in-band text track cues are not added to the the cue list more than once.

* media/track/track-in-band-cues-added-once-expected.txt: Added.
* media/track/track-in-band-cues-added-once.html: Added.
* platform/chromium/TestExpectations:
* platform/efl/TestExpectations:
* platform/gtk/TestExpectations:
* platform/mac/TestExpectations:
* platform/qt/TestExpectations:
* platform/win/TestExpectations:


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@138017 268f45cc-cd09-0410-ab3c-d52691b4dbfc