AU: check after 2 min, also every 30 min.

src/platform/update_engine/update_check_action.cc

 // Copyright (c) 2009 The Chromium OS 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 "update_engine/update_check_action.h"
 #include <inttypes.h>
 #include <sstream>
 
 #include <libxml/parser.h>
 #include <libxml/xpath.h>
@@ skipping 45 matching lines @@
  public:
   inline void operator()(void* x) const {
     xmlXPathFreeContext(reinterpret_cast<xmlXPathContext*>(x));
   }
 };
 
 // Returns a properly formatted omaha request for an update check
 string FormatRequest(const UpdateCheckParams& params) {
   return string("<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n"
       "<o:gupdate xmlns:o=\"http://www.google.com/update2/request\" "
-      "version=\"" + XmlEncode(kGupdateVersion) + "\" protocol=\"2.0\" "
+      "version=\"" + XmlEncode(kGupdateVersion) + "\" "
+      "updaterversion=\"" + XmlEncode(kGupdateVersion) + "\" "
+      "protocol=\"2.0\" "
       "machineid=\"") + XmlEncode(params.machine_id) + "\" ismachine=\"1\" "
       "userid=\"" + XmlEncode(params.user_id) + "\">\n"
       "    <o:os version=\"" + XmlEncode(params.os_version) + "\" platform=\"" +
       XmlEncode(params.os_platform) + "\" sp=\"" +
       XmlEncode(params.os_sp) + "\"></o:os>\n"
       "    <o:app appid=\"" + XmlEncode(params.app_id) + "\" version=\"" +
       XmlEncode(params.app_version) + "\" "
       "lang=\"" + XmlEncode(params.app_lang) + "\" track=\"" +
       XmlEncode(params.app_track) + "\">\n"
       "        <o:ping active=\"0\"></o:ping>\n"
@@ skipping 186 matching lines @@
   output_object.hash = XmlGetProperty(updatecheck_node, "hash");
   output_object.size = ParseInt(XmlGetProperty(updatecheck_node, "size"));
   output_object.needs_admin =
       XmlGetProperty(updatecheck_node, "needsadmin") == "true";
   output_object.prompt = XmlGetProperty(updatecheck_node, "Prompt") == "true";
   SetOutputObject(output_object);
   return;
 }
 
 };  // namespace chromeos_update_engine