[BlackBerry] Enable scoped style for BlackBerry.
https://bugs.webkit.org/show_bug.cgi?id=90418

Reviewed by Rob Buis.

.:

* Source/cmake/OptionsBlackBerry.cmake:
* Source/cmakeconfig.h.cmake:

Tools:

* Scripts/webkitperl/FeatureList.pm:


git-svn-id: svn://svn.chromium.org/blink/trunk@121726 bbb929c8-8fbe-4397-9dbb-9b2b20218538