Ensure new installs default to non-blocking

// FREEBIE

js/background.js

@@ -51,6 +51,9 @@
             SERVER_URL, SERVER_PORTS, USERNAME, PASSWORD
         );
         accountManager.addEventListener('registration', function() {
+            if (!Whisper.Registration.everDone()) {
+                storage.put('safety-numbers-approval', false);
+            }
             Whisper.Registration.markDone();
             extension.trigger('registration_done');
         });

js/chromium.js

@@ -180,24 +180,6 @@
         return 'en';
     };
 
-    window.textsecure = window.textsecure || {};
-    window.textsecure.registration = {
-        done: function () {
-            storage.put("chromiumRegistrationDoneEver", "");
-            storage.put("chromiumRegistrationDone", "");
-            extension.trigger('registration_done');
-        },
-        isDone: function () {
-            return storage.get("chromiumRegistrationDone") === "";
-        },
-        everDone: function() {
-            return storage.get("chromiumRegistrationDoneEver") === "" || storage.get("chromiumRegistrationDone") === "";
-        },
-        remove: function() {
-            storage.remove("chromiumRegistrationDone");
-        },
-    };
-
     extension.install = function(mode) {
         var id = 'installer';
         var url = 'options.html';