[BlackBerry] Adjustments to media controls appearance.
https://bugs.webkit.org/show_bug.cgi?id=113816
https://przilla.ott.qnx.com/bugzilla/show_bug.cgi?id=316398
https://przilla.ott.qnx.com/bugzilla/show_bug.cgi?id=316438

Updates to the BlackBerry media controls:
 - extend the timeline slider.
 - move the volume slider for audio elements up so it does not overlap the main panel.
 - upstream some other cosmetic changes to media controls that were not previously upstreamed.

Patch by John Griggs <jgriggs@blackberry.com> on 2013-04-03
Reviewed by Rob Buis.

BlackBerry-specific, cosmetic change; No new tests required.

* platform/blackberry/RenderThemeBlackBerry.cpp:
(WebCore::RenderThemeBlackBerry::adjustMediaControlStyle):
(WebCore::RenderThemeBlackBerry::paintMediaPlayButton):
(WebCore::RenderThemeBlackBerry::paintMediaMuteButton):
(WebCore::RenderThemeBlackBerry::paintMediaSliderTrack):
(WebCore::RenderThemeBlackBerry::paintMediaVolumeSliderTrack):
(WebCore::RenderThemeBlackBerry::paintMediaVolumeSliderThumb):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@147578 268f45cc-cd09-0410-ab3c-d52691b4dbfc