[BlackBerry] RenderThemeBlackBerry: upstream missing code
https://bugs.webkit.org/show_bug.cgi?id=114343

Patch by Alberto Garcia <agarcia@igalia.com> on 2013-04-11
Reviewed by Xan Lopez.

Add implementations of sliderTickSize() and
sliderTickOffsetFromTrackCenter(), as well as a missing header.

* platform/blackberry/RenderThemeBlackBerry.cpp:
(WebCore):
(WebCore::RenderThemeBlackBerry::sliderTickSize):
(WebCore::RenderThemeBlackBerry::sliderTickOffsetFromTrackCenter):
* platform/blackberry/RenderThemeBlackBerry.h:
(RenderThemeBlackBerry):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@148189 268f45cc-cd09-0410-ab3c-d52691b4dbfc