[BlackBerry] Selection handles don't drag to expand correctly for RTL languages
https://bugs.webkit.org/show_bug.cgi?id=111618

Reviewed by Rob Buis.

PR 303712
If we are using a RTL language, we should ensure that the selection handles are angled the right way.
Further, when expanding the selection, the start and end handles should be appropriately set so that
expansion in the natural direction is possible.

Internally reviewed by Mike Fenton.

* WebKitSupport/SelectionHandler.cpp:
(BlackBerry::WebKit::SelectionHandler::SelectionHandler):
(BlackBerry::WebKit::SelectionHandler::selectionPositionChanged):
* WebKitSupport/SelectionHandler.h:
(SelectionHandler):


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@144977 268f45cc-cd09-0410-ab3c-d52691b4dbfc