[ADD] Add trigger 'state_pushed', need in the module,

bzr revid: vta@openerp.com-20121026140515-fjo4u05t0rdtehq6

addons/web/static/src/js/chrome.js

@@ -1117,6 +1117,7 @@ instance.web.WebClient = instance.web.Client.extend({
         var url = '#' + $.param(state);
         this._current_state = _.clone(state);
         $.bbq.pushState(url);
+        this.trigger('state_pushed', state);
     },
     on_menu_action: function(options) {
         var self = this;