Apps on NTP should be in order of installation

chrome/browser/extensions/extension_updater_unittest.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <map>
 
 #include "base/compiler_specific.h"
 #include "base/file_util.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
@@ skipping 531 matching lines @@
     MessageLoop message_loop;
     content::TestBrowserThread ui_thread(BrowserThread::UI, &message_loop);
     ExtensionUpdater updater(
         &service, service.extension_prefs(), service.pref_service(),
         service.profile(), kUpdateFrequencySecs);
     updater.Start();
 
     ManifestFetchData fetch_data(GURL("http://localhost/foo"));
     UpdateManifest::Results updates;
 
-    std::set<std::string> ids_for_update_check;
+    std::list<std::string> ids_for_update_check;
     pending_extension_manager->GetPendingIdsForUpdateCheck(
         &ids_for_update_check);
 
-    std::set<std::string>::const_iterator it;
+    std::list<std::string>::const_iterator it;
     for (it = ids_for_update_check.begin();
          it != ids_for_update_check.end(); ++it) {
       fetch_data.AddExtension(*it,
                               "1.0.0.0",
                               kNeverPingedData,
                               kEmptyUpdateUrlData);
       AddParseResult(*it, "1.1", "http://localhost/e1_1.1.crx", &updates);
     }
     std::vector<int> updateable =
         updater.DetermineUpdates(fetch_data, updates);
@@ skipping 694 matching lines @@
 
 // TODO(asargent) - (http://crbug.com/12780) add tests for:
 // -prodversionmin (shouldn't update if browser version too old)
 // -manifests & updates arriving out of order / interleaved
 // -malformed update url (empty, file://, has query, has a # fragment, etc.)
 // -An extension gets uninstalled while updates are in progress (so it doesn't
 //  "come back from the dead")
 // -An extension gets manually updated to v3 while we're downloading v2 (ie
 //  you don't get downgraded accidentally)
 // -An update manifest mentions multiple updates