UMA: How often are different network error screens encountered during OOBE

chrome/browser/ui/webui/chromeos/login/enrollment_screen_handler.h

Index: chrome/browser/ui/webui/chromeos/login/enrollment_screen_handler.h
diff --git a/chrome/browser/ui/webui/chromeos/login/enrollment_screen_handler.h b/chrome/browser/ui/webui/chromeos/login/enrollment_screen_handler.h
index fb9dfac8118ef388e23afcb048f69ea44501d9d9..b8ab5c3bf889815c882c85184d49fb7b064b6135 100644
--- a/chrome/browser/ui/webui/chromeos/login/enrollment_screen_handler.h
+++ b/chrome/browser/ui/webui/chromeos/login/enrollment_screen_handler.h
@@ -25,6 +25,7 @@ class PolicyOAuth2TokenFetcher;
 namespace chromeos {
 
 class AuthenticatedUserEmailRetriever;
+class ErrorScreensHistogramHelper;
 
 // WebUIMessageHandler implementation which handles events occurring on the
 // page, such as the user pressing the signin button.
@@ -150,6 +151,8 @@ class EnrollmentScreenHandler
 
   ErrorScreenActor* error_screen_actor_;
 
+  scoped_ptr<ErrorScreensHistogramHelper> histogram_helper_;
+
   base::WeakPtrFactory<EnrollmentScreenHandler> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(EnrollmentScreenHandler);