AU: Update status to DOWNLOADING only after receiving some bytes from server.

update_engine_client.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 <gflags/gflags.h>
 #include <glib.h>
 
 #include "update_engine/marshal.glibmarshal.h"
@@ skipping 216 matching lines @@
     if (FLAGS_update && app_version.empty()) {
       app_version = "ForcedUpdate";
       LOG(INFO) << "Forcing an update by setting app_version to ForcedUpdate.";
     }
     LOG(INFO) << "Initiating update check and install.";
     CHECK(CheckForUpdates(app_version, FLAGS_omaha_url))
         << "Update check/initiate update failed.";
 
     // Wait for an update to complete.
     if (FLAGS_update) {
-      LOG(INFO) << "Waiting for update the complete.";
+      LOG(INFO) << "Waiting for update to complete.";
       CompleteUpdate();  // Should never return.
       return 1;
     }
     return 0;
   }
 
   // Start watching for updates.
   if (FLAGS_watch_for_updates) {
     LOG_IF(WARNING, FLAGS_reboot) << "-reboot flag ignored.";
     LOG(INFO) << "Watching for status updates.";
     WatchForUpdates();  // Should never return.
     return 1;
   }
 
   if (FLAGS_reboot) {
     LOG(INFO) << "Requesting a reboot...";
     CHECK(RebootIfNeeded());
     return 0;
   }
 
   LOG(INFO) << "No flags specified. Exiting.";
   return 0;
 }