Refactor ManagePasswordsBubbleModel.

components/password_manager/core/browser/password_manager_metrics_util.h

Index: components/password_manager/core/browser/password_manager_metrics_util.h
diff --git a/components/password_manager/core/browser/password_manager_metrics_util.h b/components/password_manager/core/browser/password_manager_metrics_util.h
index e7b2ddbe893b1999bbfdbe5bfa92288b91c766a8..9f22f7920d632ab43c55699aa1c620d1517fe020 100644
--- a/components/password_manager/core/browser/password_manager_metrics_util.h
+++ b/components/password_manager/core/browser/password_manager_metrics_util.h
@@ -53,11 +53,6 @@ enum UIDismissalReason {
   AUTO_SIGNIN_TOAST_CLICKED_OBSOLETE,  // obsolete.
   CLICKED_BRAND_NAME,
   NUM_UI_RESPONSES,
-
-  // If we add the omnibox icon _without_ intending to display the bubble,
-  // we actually call Close() after creating the bubble view. We don't want
-  // that to count in the metrics, so we need this placeholder value.
-  NOT_DISPLAYED
 };
 
 enum FormDeserializationStatus {