Bug 754342 - Sync pane shows "undefined" as username when using in-content preferences. r=jaws

--HG--
extra : rebase_source : 77c49df413cf04aed1ff9b6eeeacf7d2e12df204

browser/components/preferences/in-content/sync.js

@@ -65,7 +65,7 @@ let gSyncPane = {
       this.needsUpdate();
     } else {
       this.page = PAGE_HAS_ACCOUNT;
-      document.getElementById("accountName").value = Weave.Service.account;
+      document.getElementById("accountName").value = Weave.Identity.account;
       document.getElementById("syncComputerName").value = Weave.Clients.localName;
       document.getElementById("tosPP").hidden = this._usingCustomServer;
     }