Create MetricsPrivateDelegate for metricsPrivate behavior

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 f7be2a81d5b410fa8e2c98972a741bb0fe2fc2c6..101775675fd42878a9a3aaa9c3bb09b01a1f419a 100644
--- a/chrome/browser/metrics/chrome_metrics_service_accessor.h
+++ b/chrome/browser/metrics/chrome_metrics_service_accessor.h
@@ -41,8 +41,8 @@ class DomainReliabilityServiceFactory;
 
 namespace extensions {
 class ChromeExtensionWebContentsObserver;
+class ChromeMetricsPrivateDelegate;
 class FileManagerPrivateIsUMAEnabledFunction;
-class MetricsPrivateGetIsCrashReportingEnabledFunction;
 }
 
 namespace options {
@@ -100,8 +100,8 @@ class ChromeMetricsServiceAccessor : public metrics::MetricsServiceAccessor {
   friend class DataReductionProxyChromeSettings;
   friend class domain_reliability::DomainReliabilityServiceFactory;
   friend class extensions::ChromeExtensionWebContentsObserver;
+  friend class extensions::ChromeMetricsPrivateDelegate;
   friend class extensions::FileManagerPrivateIsUMAEnabledFunction;
-  friend class extensions::MetricsPrivateGetIsCrashReportingEnabledFunction;
   friend void ChangeMetricsReportingStateWithReply(
       bool,
       const OnMetricsReportingCallbackType&);