Remove unneeded Friend from chrome_metrics_service_accessor

chrome/browser/metrics/chrome_metrics_service_accessor.h

Index: chrome/browser/metrics/chrome_metrics_service_accessor.h
diff --git a/chrome/browser/metrics/chrome_metrics_service_accessor.h b/chrome/browser/metrics/chrome_metrics_service_accessor.h
index 975765b9aa5ed01aa316e1dcb00ff9b9798c9e4d..a0af99423e8ff114e2a15c52d08cd2013e7f0996 100644
--- a/chrome/browser/metrics/chrome_metrics_service_accessor.h
+++ b/chrome/browser/metrics/chrome_metrics_service_accessor.h
@@ -14,7 +14,6 @@
 #include "chrome/browser/metrics/metrics_service_accessor.h"
 
 class ChromeExtensionDownloaderFactory;
-class PrefService;
 class Profile;
 
 namespace {
@@ -22,12 +21,6 @@ class CrashesDOMHandler;
 class FlashDOMHandler;
 }
 
-namespace component_updater {
-class ComponentUpdateService;
-void RegisterSwReporterComponent(ComponentUpdateService* cus,
-                                 PrefService* prefs);
-}
-
 namespace extensions {
 class MetricsPrivateGetIsCrashReportingEnabledFunction;
 }
@@ -49,9 +42,6 @@ class BrowserOptionsHandler;
 // as a 'friend' below.
 class ChromeMetricsServiceAccessor : public MetricsServiceAccessor {
  private:
-  friend void component_updater::RegisterSwReporterComponent(
-      component_updater::ComponentUpdateService* cus,
-      PrefService* prefs);
   friend bool prerender::IsOmniboxEnabled(Profile* profile);
   friend class ChromeExtensionDownloaderFactory;
   friend class ChromeRenderMessageFilter;