Minor cleanup of EnrollmentHandlerChromeOS.

chrome/browser/chromeos/policy/auto_enrollment_client.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/policy/auto_enrollment_client.h"
 
 #include "base/bind.h"
 #include "base/guid.h"
 #include "base/location.h"
 #include "base/logging.h"
@@ skipping 58 matching lines @@
     em::DeviceStateRetrievalResponse::RestoreMode restore_mode) {
   switch (restore_mode) {
     case em::DeviceStateRetrievalResponse::RESTORE_MODE_NONE:
       return std::string();
     case em::DeviceStateRetrievalResponse::RESTORE_MODE_REENROLLMENT_REQUESTED:
       return kDeviceStateRestoreModeReEnrollmentRequested;
     case em::DeviceStateRetrievalResponse::RESTORE_MODE_REENROLLMENT_ENFORCED:
       return kDeviceStateRestoreModeReEnrollmentEnforced;
   }
 
+  // Return is required to avoid compiler warning.
   NOTREACHED() << "Bad restore mode " << restore_mode;
   return std::string();
 }
 
 }  // namespace
 
 AutoEnrollmentClient::AutoEnrollmentClient(
     const ProgressCallback& callback,
     DeviceManagementService* service,
     PrefService* local_state,
@@ skipping 354 matching lines @@
   base::TimeDelta delta = kZero;
   if (!time_extra_start_.is_null())
     delta = now - time_extra_start_;
   // This samples |kZero| when there was no need for extra time, so that we can
   // measure the ratio of users that succeeded without needing a delay to the
   // total users going through OOBE.
   UMA_HISTOGRAM_CUSTOM_TIMES(kUMAExtraTime, delta, kMin, kMax, kBuckets);
 }
 
 }  // namespace policy