[webkit-dev] Review of GTK+'s port policy signals

[Pierre-Luc Beaudoin]

Hi,

We'd like to get more reviewers involved in the GTK+.  We specifically
need this to be reviewed: 
http://bugs.webkit.org/show_bug.cgi?id=16562

This patch implements what WebPolicyDelegate and
WebPolicyDecisionListener offers.  The first tries were sync, but the
latest version is async and more like the Mac port. We'd like your
feedback on it.  

I did try to make it binding friendly but is the approach futur-proof? 

Thanks,

Pierre-Luc Beaudoin