[BlackBerry] Gradient: don't use the default setPlatformGradientSpaceTransform()
https://bugs.webkit.org/show_bug.cgi?id=112246

Patch by Alberto Garcia <agarcia@igalia.com> on 2013-03-14
Reviewed by Xan Lopez.

BlackBerry has its own implementation.

* platform/graphics/Gradient.cpp:
(WebCore):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@145834 268f45cc-cd09-0410-ab3c-d52691b4dbfc