[BlackBerry] Improve Fatfinger phase.
https://bugs.webkit.org/show_bug.cgi?id=107403

Patch by Tiancheng Jiang <tijiang@rim.com> on 2013-01-20
Reviewed by Rob Buis.

RIM PR 219489
Internally reviewd by Mike Fenton & Gen Mak.

Treat ClickableByDefault and MadeClickableByTheWebpage elements as
same category. Avoid unnecessary nodes check step.

* WebKitSupport/FatFingers.cpp:
(BlackBerry::WebKit::FatFingers::isElementClickable):
(BlackBerry::WebKit::FatFingers::FatFingers):
(BlackBerry::WebKit::FatFingers::findBestPoint):
(BlackBerry::WebKit::FatFingers::getNodesFromRect):
* WebKitSupport/FatFingers.h:

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@140282 268f45cc-cd09-0410-ab3c-d52691b4dbfc