Bug 1698767 - Use ExtContentPolicyType instead of InternalContentPolicyType in SecFetch::IsUserTriggeredForSecFetchSite r=ckerschb

The internal content policy type of `TYPE_INTERNAL_IFRAME` gets mapped to `ExtContentPolicy::TYPE_SUBDOCUMENT`, so there is no need to use the internal type.

Differential Revision: https://phabricator.services.mozilla.com/D108640

dom/security/SecFetch.cpp

@@ -202,13 +202,12 @@ bool IsUserTriggeredForSecFetchSite(nsIHttpChannel* aHTTPChannel) {
    * user agent’s address bar, bookmarks, etc).
    */
   nsCOMPtr<nsILoadInfo> loadInfo = aHTTPChannel->LoadInfo();
-  nsContentPolicyType contentType = loadInfo->InternalContentPolicyType();
+  ExtContentPolicyType contentType = loadInfo->GetExternalContentPolicyType();
 
   // only requests wich result in type "document" are subject to
   // user initiated actions in the context of SecFetch.
-  if (contentType != nsIContentPolicy::TYPE_DOCUMENT &&
-      contentType != nsIContentPolicy::TYPE_SUBDOCUMENT &&
-      contentType != nsIContentPolicy::TYPE_INTERNAL_IFRAME) {
+  if (contentType != ExtContentPolicy::TYPE_DOCUMENT &&
+      contentType != ExtContentPolicy::TYPE_SUBDOCUMENT) {
     return false;
   }