[BlackBerry] Set mouse document position for mouse event in DRT.

[BlackBerry] Set mouse document position for mouse event in DRT.
https://bugs.webkit.org/show_bug.cgi?id=109094.

Patch by Tiancheng Jiang <tijiang@rim.com> on 2013-02-11
Reviewed by Rob Buis.

RIM PR 246976.
Internally Reviewed by Nima Ghanavatian & Genevieve Mak.

Set mouse document position when we create mouse event in DRT.

* DumpRenderTree/blackberry/EventSender.cpp:
(setMouseEventDocumentPos):
(mouseDownCallback):
(mouseUpCallback):
(mouseMoveToCallback):

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@142487 268f45cc-cd09-0410-ab3c-d52691b4dbfc