Reviewed by Eric Carlson.

        Clean up the Media Controls CSS for Qt
        https://bugs.webkit.org/show_bug.cgi?id=52822

        Split the audio::-webkit-media-xxx and video::-webkit-media-xxx rules
        in mediaControlsQt.css, and remove the duplicate audio::-webkit-media-xxx
        rules from mediaControlsQtFullscreen.css.

        * css/mediaControlsQt.css:
        (audio::-webkit-media-controls-panel):
        (video::-webkit-media-controls-panel):
        (audio::-webkit-media-controls-mute-button):
        (video::-webkit-media-controls-mute-button):
        (audio::-webkit-media-controls-play-button):
        (video::-webkit-media-controls-play-button):
        (audio::-webkit-media-controls-timeline-container):
        (video::-webkit-media-controls-timeline-container):
        (audio::-webkit-media-controls-current-time-display):
        (video::-webkit-media-controls-current-time-display):
        (audio::-webkit-media-controls-time-remaining-display):
        (video::-webkit-media-controls-time-remaining-display):
        (audio::-webkit-media-controls-timeline):
        (video::-webkit-media-controls-timeline):
        (audio::-webkit-media-controls-volume-slider-container):
        (video::-webkit-media-controls-volume-slider-container):
        (audio::-webkit-media-controls-volume-slider):
        (video::-webkit-media-controls-volume-slider):
        (audio::-webkit-media-controls-seek-back-button):
        (video::-webkit-media-controls-seek-back-button):
        (audio::-webkit-media-controls-seek-forward-button):
        (video::-webkit-media-controls-seek-forward-button):
        (audio::-webkit-media-controls-fullscreen-button):
        (video::-webkit-media-controls-fullscreen-button):
        (audio::-webkit-media-controls-rewind-button):
        (video::-webkit-media-controls-rewind-button):
        (audio::-webkit-media-controls-return-to-realtime-button):
        (video::-webkit-media-controls-return-to-realtime-button):
        (audio::-webkit-media-controls-toggle-closed-captions-button):
        (video::-webkit-media-controls-toggle-closed-captions-button):
        * css/mediaControlsQtFullscreen.css:
        (video::-webkit-media-controls-time-remaining-display):
        (video::-webkit-media-controls-seek-back-button):
        (video::-webkit-media-controls-seek-forward-button):
        (video::-webkit-media-controls-rewind-button):
        (video::-webkit-media-controls-return-to-realtime-button):
        (video::-webkit-media-controls-toggle-closed-captions-button):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@76272 268f45cc-cd09-0410-ab3c-d52691b4dbfc