Collapse OS(UNIX)||OS(ANDROID) to OS(UNIX)
https://bugs.webkit.org/show_bug.cgi?id=108091

Patch by Laszlo Gombos <l.gombos@samsung.com> on 2013-01-28
Reviewed by Adam Barth.

OS(UNIX) is defined when OS(ANDROID) is defined.

* src/WebViewImpl.cpp:
(WebKit::WebViewImpl::handleMouseDown):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@140989 268f45cc-cd09-0410-ab3c-d52691b4dbfc