[BlackBerry] Don't cross editing boundary when touch hold selection expands
https://bugs.webkit.org/show_bug.cgi?id=113537

Patch by Iris Wu <shuwu@blackberry.com> on 2013-03-28
Reviewed by Rob Buis.

Set editing boundary crossing rule to make sure it won't cross
editing boundary when selection expands.

Reviewed Internally By Genevieve Mak and Mike Fenton.

* WebKitSupport/SelectionHandler.cpp:
(BlackBerry::WebKit::SelectionHandler::selectNextParagraph):
(BlackBerry::WebKit::SelectionHandler::findNextAnimationOverlayRegion):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@147189 268f45cc-cd09-0410-ab3c-d52691b4dbfc