Replace chromeos::UserManager::Get() with chromeos::GetUserManager().

chrome/browser/extensions/api/feedback_private/feedback_service_chromeos.cc

 // Copyright 2013 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/extensions/api/feedback_private/feedback_service.h"
 
 #include "base/callback.h"
 #include "base/memory/weak_ptr.h"
 #include "base/metrics/statistics_recorder.h"
 #include "base/values.h"
@@ skipping 22 matching lines @@
   return new FeedbackServiceImpl;
 }
 
 FeedbackServiceImpl::FeedbackServiceImpl() {
 }
 
 FeedbackServiceImpl::~FeedbackServiceImpl() {
 }
 
 std::string FeedbackServiceImpl::GetUserEmail() {
-  chromeos::UserManager* manager = chromeos::UserManager::Get();
+  chromeos::UserManager* manager = chromeos::GetUserManager();
   if (!manager)
     return std::string();
   else
     return manager->GetLoggedInUser()->display_email();
 }
 
 void FeedbackServiceImpl::GetHistograms(std::string* histograms) {
   *histograms = base::StatisticsRecorder::ToJSON(std::string());
 }
 
 base::WeakPtr<FeedbackService> FeedbackServiceImpl::GetWeakPtr() {
   return AsWeakPtr();
 }
 
 }  // namespace extensions