Bug 739145: Enable b2g updates. pending-r=gal (npotb)

b2g/app/b2g.js

@@ -492,12 +492,15 @@ pref("app.update.incompatible.mode", 0);
 pref("app.update.service.enabled", true);
 
 // The URL hosting the update manifest.
-//pref("app.update.url", "http://localhost/updates.xml");
+pref("app.update.url", "http://update.boot2gecko.org/m2.5/updates.xml");
 // Interval at which update manifest is fetched.  In units of seconds.
-pref("app.update.interval", 86400); // 24 hours
+pref("app.update.interval", 3600); // 1 hour
 // First interval to elapse before checking for update.  In units of
 // milliseconds.  Capped at 10 seconds.
 pref("app.update.timerFirstInterval", 30000);
+pref("app.update.timerMinimumDelay", 30); // seconds
+// Don't throttle background updates.
+pref("app.update.download.backgroundInterval", 0);
 
 // Enable update logging for now, to diagnose growing pains in the
 // field.