Splitting the concept of UMA consent, and should UMA report.

ios/chrome/browser/metrics/ios_chrome_metrics_services_manager_client.h

Index: ios/chrome/browser/metrics/ios_chrome_metrics_services_manager_client.h
diff --git a/ios/chrome/browser/metrics/ios_chrome_metrics_services_manager_client.h b/ios/chrome/browser/metrics/ios_chrome_metrics_services_manager_client.h
index 38d939f52290b8e13df73df5083e98ff1cd04210..2a1e1a9421fa53318fcbbf20b8563451382ad9e7 100644
--- a/ios/chrome/browser/metrics/ios_chrome_metrics_services_manager_client.h
+++ b/ios/chrome/browser/metrics/ios_chrome_metrics_services_manager_client.h
@@ -14,6 +14,7 @@
 class PrefService;
 
 namespace metrics {
+class EnabledStateProvider;
 class MetricsStateManager;
 }
 
@@ -26,6 +27,8 @@ class IOSChromeMetricsServicesManagerClient
   ~IOSChromeMetricsServicesManagerClient() override;
 
  private:
+  class IOSChromeEnabledStateProvider;

[Alexei Svitkine (slow), 2016/05/11 18:37:26]

Nit: Move to be an anon namespace class and remove this.

[jwd, 2016/05/11 19:17:04]

Adding comment.

+
   // metrics_services_manager::MetricsServicesManagerClient:
   std::unique_ptr<rappor::RapporService> CreateRapporService() override;
   std::unique_ptr<variations::VariationsService> CreateVariationsService()
@@ -44,6 +47,10 @@ class IOSChromeMetricsServicesManagerClient
   // MetricsStateManager which is passed as a parameter to service constructors.
   std::unique_ptr<metrics::MetricsStateManager> metrics_state_manager_;
 
+  // EnabledStateProvider to communicate if the client has consented to metrics
+  // reporting, and if it's enabled.
+  std::unique_ptr<metrics::EnabledStateProvider> enabled_state_provider_;
+
   // Ensures that all functions are called from the same thread.
   base::ThreadChecker thread_checker_;