[Mac] The captions menu should not use a canned max-width and max-height
https://bugs.webkit.org/show_bug.cgi?id=115968

Reviewed by Eric Carlson.

Use more real estate to display the captions menu should the caption names
be long.

* css/mediaControlsQuickTime.css:
(video::-webkit-media-controls-closed-captions-container):
(video::-webkit-media-controls-closed-captions-track-list):
Make the captions menu scale to a max-width and max-height to allow 4px
above and below the menu, except on the right where it always aligns with
the captions icon in the media controller.
* html/shadow/MediaControlsApple.cpp:
(WebCore::MediaControlsApple::createControls):
Move the captions menu element to be a child of the controls instead of
the panel such that it may scale relative to the controls when using %
CSS values.


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@149942 268f45cc-cd09-0410-ab3c-d52691b4dbfc