AU: Implement switching of tracks through SetTrack.

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 171 matching lines @@
   GError* error = NULL;
 
   CHECK(GetProxy(&proxy));
 
   gboolean rc =
       org_chromium_UpdateEngineInterface_set_track(proxy,
                                                    track.c_str(),
                                                    &error);
   CHECK_EQ(rc, true) << "Error setting the track: "
                      << GetGErrorMessage(error);
-  LOG(INFO) << "TODO: Track permanently set to: " << track;
+  LOG(INFO) << "Track permanently set to: " << track;
 }
 
 static gboolean CompleteUpdateSource(gpointer data) {
   string current_op;
   if (!GetStatus(&current_op) || current_op == "UPDATE_STATUS_IDLE") {
     LOG(ERROR) << "Update failed.";
     exit(1);
   }
   if (current_op == "UPDATE_STATUS_UPDATED_NEED_REBOOT") {
     LOG(INFO) << "Update succeeded -- reboot needed.";
@@ skipping 70 matching lines @@
 
   if (FLAGS_reboot) {
     LOG(INFO) << "Requesting a reboot...";
     CHECK(RebootIfNeeded());
     return 0;
   }
 
   LOG(INFO) << "Done.";
   return 0;
 }