Improve UI for unpacked extensions failing to load

chrome/browser/chrome_notification_types.h

Index: chrome/browser/chrome_notification_types.h
diff --git a/chrome/browser/chrome_notification_types.h b/chrome/browser/chrome_notification_types.h
index 03085a8d36c01095f55f29726ce218e60226bcf1..eb5ed40342d01fad4b6a435a7abecc75b5c98a22 100644
--- a/chrome/browser/chrome_notification_types.h
+++ b/chrome/browser/chrome_notification_types.h
@@ -415,12 +415,6 @@ enum NotificationType {
   // string with details about why the load failed.
   NOTIFICATION_EXTENSION_LOAD_ERROR,
 
-  // Sent when an unpacked extension fails to load. The details are a std::pair,
-  // the first object is a boolean signifying the user's retry response value,
-  // and the second object is a const base::FilePath& of the extension that
-  // failed to load. Source is a Profile.
-  NOTIFICATION_EXTENSION_LOAD_RETRY,
-
   // Sent when an extension is enabled. Under most circumstances, listeners
   // will want to use NOTIFICATION_EXTENSION_LOADED_DEPRECATED. This
   // notification is only