Separate the NTP app ordering from the app list app ordering

chrome/browser/extensions/extension_sorting.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 "chrome/browser/extensions/extension_sorting.h"
 
 #include <algorithm>
 #include <vector>
 
 #include "chrome/browser/chrome_notification_types.h"
@@ skipping 605 matching lines @@
     const AppLaunchOrdinalMap& m) const {
   size_t result = 0;
   for (AppLaunchOrdinalMap::const_iterator it = m.begin(); it != m.end();
        ++it) {
     const std::string& id = it->second;
     if (ntp_hidden_extensions_.count(id) == 0)
       result++;
   }
   return result;
 }
+
+void ExtensionSorting::GetOrderedExtensionIds(
+    extensions::ExtensionIdList* out) const {
+  for (PageOrdinalMap::const_iterator page_it = ntp_ordinal_map_.begin();
+       page_it != ntp_ordinal_map_.end(); ++page_it) {
+    const AppLaunchOrdinalMap& page = page_it->second;
+    for (AppLaunchOrdinalMap::const_iterator app_launch_it = page.begin();
+         app_launch_it != page.end(); ++app_launch_it) {
+      out->push_back(app_launch_it->second);
+    }
+  }
+}