simplify some tests on the checkup page

www/checkup/main.js

@@ -574,6 +574,19 @@ define([
         }
     };
 
+    var deferredPostMessage = function (content, _cb) {
+        var cb = Util.once(Util.mkAsync(_cb));
+        nThen(function (w) {
+            sandboxIframeReady.reg(w(function (err) {
+                if (!err) { return; }
+                w.abort();
+                cb(err);
+            }));
+        }).nThen(function () {
+            postMessage(content, cb);
+        });
+    };
+
     window.addEventListener('message', function (event) {
         try {
             var msg = JSON.parse(event.data);
@@ -638,14 +651,7 @@ define([
         var url = '/sheet/inner.html';
         var cb = Util.once(Util.mkAsync(_cb));
         msg.appendChild(CSP_WARNING(url));
-        nThen(function (w) {
-            sandboxIframeReady.reg(w(function (err) {
-                if (!err) { return; }
-                w.abort();
-                cb(err);
-            }));
-        }).nThen(function () {
-            postMessage({
+        deferredPostMessage({
             command: 'GET_HEADER',
             content: {
                 url: url,
@@ -656,19 +662,11 @@ define([
             cb(hasOnlyOfficeHeaders(CSP_headers));
         });
     });
-    });
 
     assert(function (cb, msg) {
         var url = '/common/onlyoffice/v4/web-apps/apps/spreadsheeteditor/main/index.html';
         msg.appendChild(CSP_WARNING(url));
-        nThen(function (w) {
-            sandboxIframeReady.reg(w(function (err) {
-                if (!err) { return; }
-                w.abort();
-                cb(err);
-            }));
-        }).nThen(function () {
-            postMessage({
+        deferredPostMessage({
             command: 'GET_HEADER',
             content: {
                 url: url,
@@ -679,7 +677,6 @@ define([
             cb(hasOnlyOfficeHeaders(CSP_headers));
         });
     });
-    });
 
     assert(function (cb, msg) {
         var url = '/sheet/inner.html';
@@ -689,14 +686,7 @@ define([
             code("'cross-origin-opener-policy'"),
             ' headers set.',
         ]));
-        nThen(function (w) {
-            sandboxIframeReady.reg(w(function (err) {
-                if (!err) { return; }
-                w.abort();
-                cb(err);
-            }));
-        }).nThen(function () {
-            postMessage({
+        deferredPostMessage({
             command: 'GET_HEADER',
             content: {
                 url: url,
@@ -706,7 +696,6 @@ define([
             cb(content === 'same-origin');
         });
     });
-    });
 
     if (false) {
         assert(function (cb, msg) {

www/checkup/sandbox/main.js

@@ -1,12 +1,10 @@
 define([
     'jquery',
-    //'/bower_components/nthen/index.js',
-    //'/common/common-util.js',
 
     '/bower_components/tweetnacl/nacl-fast.min.js',
     'css!/bower_components/components-font-awesome/css/font-awesome.min.css',
     'less!/checkup/app-checkup.less',
-], function ($ /*, nThen, Util */) {
+], function ($) {
     var postMessage = function (content) {
         window.parent.postMessage(JSON.stringify(content), '*');
     };