Measure and send update time to UMA.

main.cc

 // Copyright (c) 2010 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 <string>
 #include <tr1/memory>
 #include <vector>
+
 #include <gflags/gflags.h>
 #include <glib.h>
+
 #include "base/command_line.h"
 #include "chromeos/obsolete_logging.h"
+#include "metrics/metrics_library.h"
 #include "update_engine/dbus_constants.h"
 #include "update_engine/dbus_service.h"
 #include "update_engine/update_attempter.h"
 
 extern "C" {
 #include "update_engine/update_engine.dbusserver.h"
 }
 
 DEFINE_bool(logtostderr, false,
             "Write logs to stderr instead of to a file in log_dir.");
@@ skipping 73 matching lines @@
                        logging::DONT_LOCK_LOG_FILE,
                        logging::APPEND_TO_OLD_LOG_FILE);
   if (!FLAGS_foreground)
     PLOG_IF(FATAL, daemon(0, 0) == 1) << "daemon() failed";
 
   LOG(INFO) << "Chrome OS Update Engine starting";
 
   // Create the single GMainLoop
   GMainLoop* loop = g_main_loop_new(g_main_context_default(), FALSE);
 
+  MetricsLibrary metrics_lib;
+  metrics_lib.Init();
+
   // Create the update attempter:
-  chromeos_update_engine::UpdateAttempter update_attempter;
+  chromeos_update_engine::UpdateAttempter update_attempter(&metrics_lib);
 
   // Create the dbus service object:
   dbus_g_object_type_install_info(UPDATE_ENGINE_TYPE_SERVICE,
                                   &dbus_glib_update_engine_service_object_info);
   UpdateEngineService* service =
       UPDATE_ENGINE_SERVICE(g_object_new(UPDATE_ENGINE_TYPE_SERVICE, NULL));
   service->update_attempter_ = &update_attempter;
   update_attempter.set_dbus_service(service);
   chromeos_update_engine::SetupDbusService(service);
 
@@ skipping 15 matching lines @@
   g_main_loop_run(loop);
 
   // Cleanup:
   g_main_loop_unref(loop);
   update_attempter.set_dbus_service(NULL);
   g_object_unref(G_OBJECT(service));
 
   LOG(INFO) << "Chrome OS Update Engine terminating";
   return 0;
 }