Bug 885156 - Set _started in PushService.init(). r=dougt

dom/push/src/PushService.jsm

@@ -460,6 +460,8 @@ this.PushService = {
     prefs.observe("serverURL", this);
     // Used to monitor if the user wishes to disable Push.
     prefs.observe("connection.enabled", this);
+
+    this._started = true;
   },
 
   _shutdownWS: function() {

dom/push/src/PushServiceLauncher.js

@@ -27,6 +27,7 @@ PushServiceLauncher.prototype = {
         Services.obs.addObserver(this, "final-ui-startup", true);
         break;
       case "final-ui-startup":
+        Services.obs.removeObserver(this, "final-ui-startup");
         if (!Services.prefs.getBoolPref("services.push.enabled")) {
           return;
         }