moebius#226: Consider blocking top level window data: URIs (part 2/2 without tests)

https://github.com/MoonchildProductions/moebius/pull/226

docshell/base/nsDocShell.cpp

@@ -9885,15 +9885,6 @@ nsDocShell::InternalLoad(nsIURI* aURI,
     contentType = nsIContentPolicy::TYPE_DOCUMENT;
   }
 
-  if (!nsContentSecurityManager::AllowTopLevelNavigationToDataURI(
-        aURI,
-        contentType,
-        aTriggeringPrincipal,
-        (aLoadType == LOAD_NORMAL_EXTERNAL))) {
-    // logging to console happens within AllowTopLevelNavigationToDataURI
-    return NS_OK;
-  }
-
   // If there's no targetDocShell, that means we are about to create a new window,
   // perform a content policy check before creating the window.
   if (!targetDocShell) {
@@ -10962,6 +10953,7 @@ nsDocShell::DoURILoad(nsIURI* aURI,
   if (aPrincipalToInherit) {
     loadInfo->SetPrincipalToInherit(aPrincipalToInherit);
   }
+  loadInfo->SetLoadTriggeredFromExternal(aLoadFromExternal);
 
   // We have to do this in case our OriginAttributes are different from the
   // OriginAttributes of the parent document. Or in case there isn't a