[BlackBerry] speed up text selection for large selections

[BlackBerry] speed up text selection for large selections
https://bugs.webkit.org/show_bug.cgi?id=81536

When selecting large disjoint areas of text the cost
of calculating the IntRectRegion union becomes very
expensive. Simply placing all of the text quads into
the IntRectRegion is faster despite the larger memory
footprint and the additional calculations at render
time.

Patch by Tyler Abbott <tabbott@rim.com> on 2012-03-19
Reviewed by Rob Buis.

* WebKitSupport/SelectionHandler.cpp:
(BlackBerry::WebKit::SelectionHandler::getConsolidatedRegionOfTextQuadsForSelection):

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@111259 268f45cc-cd09-0410-ab3c-d52691b4dbfc