[Merge to M60] Fix crash of update-over-cellular icon

chrome/browser/chromeos/upgrade_detector_chromeos.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/chromeos/upgrade_detector_chromeos.h"
 
 #include <stdint.h>
 
 #include "base/macros.h"
 #include "base/memory/singleton.h"
@@ skipping 84 matching lines @@
   if (status.status == UpdateEngineClient::UPDATE_STATUS_UPDATED_NEED_REBOOT) {
     upgrade_detected_time_ = base::Time::Now();
 
     channels_requester_.reset(new UpgradeDetectorChromeos::ChannelsRequester());
     channels_requester_->RequestChannels(
         base::Bind(&UpgradeDetectorChromeos::OnChannelsReceived,
                    weak_factory_.GetWeakPtr()));
   } else if (status.status ==
              UpdateEngineClient::UPDATE_STATUS_NEED_PERMISSION_TO_UPDATE) {
     // Update engine broadcasts this state only when update is available but
-    // downloading over cellular connection requires user's agreement
+    // downloading over cellular connection requires user's agreement.
     NotifyUpdateOverCellularAvailable();
   }
 }
 
 void UpgradeDetectorChromeos::NotifyOnUpgrade() {
   base::TimeDelta delta = base::Time::Now() - upgrade_detected_time_;
   int64_t time_passed = delta.InDays();
 
   const int kSevereThreshold = 7;
   const int kHighThreshold = 4;
@@ skipping 41 matching lines @@
 
 // static
 UpgradeDetectorChromeos* UpgradeDetectorChromeos::GetInstance() {
   return base::Singleton<UpgradeDetectorChromeos>::get();
 }
 
 // static
 UpgradeDetector* UpgradeDetector::GetInstance() {
   return UpgradeDetectorChromeos::GetInstance();
 }