Rename MetricsServiceHelper to ChromeMetricsServiceAccessor.

chrome/browser/chrome_browser_metrics_service_observer.cc

 // Copyright 2014 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/chrome_browser_metrics_service_observer.h"
 
-#include "chrome/browser/metrics/metrics_service.h"
+#include "chrome/browser/metrics/chrome_metrics_service_accessor.h"
 #include "net/base/network_change_notifier.h"
 
 ChromeBrowserMetricsServiceObserver::ChromeBrowserMetricsServiceObserver() {
-  MetricsServiceHelper::AddMetricsServiceObserver(this);
+  ChromeMetricsServiceAccessor::AddMetricsServiceObserver(this);
 }
 
 ChromeBrowserMetricsServiceObserver::~ChromeBrowserMetricsServiceObserver() {
-  MetricsServiceHelper::RemoveMetricsServiceObserver(this);
+  ChromeMetricsServiceAccessor::RemoveMetricsServiceObserver(this);
 }
 
 void ChromeBrowserMetricsServiceObserver::OnDidCreateMetricsLog() {
   net::NetworkChangeNotifier::LogOperatorCodeHistogram(
       net::NetworkChangeNotifier::GetConnectionType());
 }