Rename MetricsServiceHelper to ChromeMetricsServiceAccessor.

chrome/browser/chrome_browser_metrics_service_observer.cc

Index: chrome/browser/chrome_browser_metrics_service_observer.cc
diff --git a/chrome/browser/chrome_browser_metrics_service_observer.cc b/chrome/browser/chrome_browser_metrics_service_observer.cc
index cf8e986d93b65957363e20cd3a8971a3a3dca21a..d3549ef8987e74a4c9c210f45033b5062383b1f8 100644
--- a/chrome/browser/chrome_browser_metrics_service_observer.cc
+++ b/chrome/browser/chrome_browser_metrics_service_observer.cc
@@ -4,15 +4,15 @@
 
 #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() {