Supervised users: if history recording is off, allow incognito and deleting history

chrome/browser/supervised_user/supervised_user_constants.h

Index: chrome/browser/supervised_user/supervised_user_constants.h
diff --git a/chrome/browser/supervised_user/supervised_user_constants.h b/chrome/browser/supervised_user/supervised_user_constants.h
index 77e5f4b753ee5a6a7cc0910a1c1d239c353461be..3d3d698912f60fe01144793e1423a616f63e01f2 100644
--- a/chrome/browser/supervised_user/supervised_user_constants.h
+++ b/chrome/browser/supervised_user/supervised_user_constants.h
@@ -9,10 +9,12 @@ namespace supervised_users {
 
 // Keys for supervised user settings. These are configured remotely and mapped
 // to preferences by the SupervisedUserPrefStore.
+extern const char kAllowDeletingBrowserHistory[];
 extern const char kContentPackDefaultFilteringBehavior[];
 extern const char kContentPackManualBehaviorHosts[];
 extern const char kContentPackManualBehaviorURLs[];
 extern const char kForceSafeSearch[];
+extern const char kIncognitoModeAvailability[];
 extern const char kRecordHistory[];
 extern const char kSigninAllowed[];
 extern const char kUserName[];