https://bugs.webkit.org/show_bug.cgi?id=85050

Reviewed by Eric Carlson.

The spec recently changed away from enumeration to string for the type
of TextTrack mode.
http://dev.w3.org/html5/spec/media-elements.html#texttrackmode

Source/WebCore:

No new tests. Updates to existing tests.

* html/HTMLMediaElement.cpp:

Use the new string mode rather than the old enum.  Also, TextTrack::setMode()
no longer requires an ExceptionCode:
(WebCore::HTMLMediaElement::loadInternal):
(WebCore::HTMLMediaElement::textTrackModeChanged):
(WebCore::HTMLMediaElement::textTrackKindChanged):
(WebCore::HTMLMediaElement::addTextTrack):
(WebCore::HTMLMediaElement::showingTrackWithSameKind):
(WebCore::HTMLMediaElement::configureTextTrackGroup):
(WebCore::HTMLMediaElement::configureNewTextTracks):
(WebCore::HTMLMediaElement::configureTextTrackDisplay):

* html/track/TextTrack.cpp:

Update these methods to use ConstructFromLiteral for efficiency:
(WebCore::TextTrack::subtitlesKeyword):
(WebCore::TextTrack::captionsKeyword):
(WebCore::TextTrack::descriptionsKeyword):
(WebCore::TextTrack::chaptersKeyword):
(WebCore::TextTrack::metadataKeyword):

New methods to use for the mode string (replacing the enum):
(WebCore::TextTrack::disabledKeyword):
(WebCore::TextTrack::hiddenKeyword):
(WebCore::TextTrack::showingKeyword):

(WebCore::TextTrack::TextTrack): Initialize mode to disabled.
(WebCore::TextTrack::setMode): Remove ExceptionCode and no longer throw an
INVALID_ACCESS_ERR.
(WebCore::TextTrack::mode): Return a keyword string instead of an enum.

Use the new string mode rather than the old enum:
(WebCore::TextTrack::cues):
(WebCore::TextTrack::activeCues):
(WebCore::TextTrack::isRendered):

* html/track/TextTrack.h: Remove old enum, add new string keyword methods,
and update mode() and setMode() accordingly.

* html/track/TextTrack.idl: Remove old enum and make mode attribute be a string.

Use the new string mode rather than the old enum:
* html/track/TextTrackCue.cpp:
(WebCore::TextTrackCue::dispatchEvent):
(WebCore::TextTrackCue::isActive):

LayoutTests:

Remove check for mode constants as we are no longer using an enum:
* media/track/track-constants-expected.txt:
* media/track/track-constants.html:

Update tests to use the new strings rather than the enums:
* media/track/track-delete-during-setup-expected.txt:
* media/track/track-delete-during-setup.html:
* media/track/track-element-dom-change-crash-expected.txt:
* media/track/track-element-dom-change-crash.html:
* media/track/track-load-from-src-readyState.html:
* media/track/track-mode-expected.txt:
* media/track/track-mode-not-changed-by-new-track-expected.txt:
* media/track/track-mode-not-changed-by-new-track.html:
* media/track/track-mode-triggers-loading-expected.txt:
* media/track/track-mode-triggers-loading.html:
* media/track/track-mode.html:
* media/track/track-texttracks-expected.txt:
* media/track/track-texttracks.html:
* media/video-test.js:
(enableAllTextTracks):


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@126786 268f45cc-cd09-0410-ab3c-d52691b4dbfc