[BlackBerry] Do not access BackForwardListImpl from DRT
https://bugs.webkit.org/show_bug.cgi?id=115041

Patch by Xan Lopez <xlopez@igalia.com> on 2013-04-23
Reviewed by Carlos Garcia Campos.

Source/WebKit/blackberry:

Export the necessary functionality in our BackForwardList port
client in order for DRT to work.

* WebCoreSupport/BackForwardListBlackBerry.cpp:
(WebCore::BackForwardListBlackBerry::backListWithLimit):
(WebCore):
(WebCore::BackForwardListBlackBerry::forwardListWithLimit):
(WebCore::BackForwardListBlackBerry::capacity):
* WebCoreSupport/BackForwardListBlackBerry.h:
(BackForwardListBlackBerry):

Tools:

Use the right class to access the bflist functionality.

* DumpRenderTree/blackberry/DumpRenderTree.cpp:
(BlackBerry::WebKit::dumpBackForwardListForWebView):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@148969 268f45cc-cd09-0410-ab3c-d52691b4dbfc