Bug 790905 - Make the compartment principal of autoconfig_glob match the principal passed to JS::Evaluate. r=bz

extensions/pref/autoconfig/src/nsJSConfigTriggers.cpp

@@ -131,7 +131,10 @@ nsresult CentralizedAdminPrefManagerInit()
         static_cast<nsIXPCSecurityManager*>(new AutoConfigSecMan());
     xpc->SetSecurityManagerForJSContext(autoconfig_cx, secman, 0);
 
-    autoconfig_glob = JS_NewGlobalObject(autoconfig_cx, &global_class, NULL);
+
+    nsCOMPtr<nsIPrincipal> principal;
+    nsContentUtils::GetSecurityManager()->GetSystemPrincipal(getter_AddRefs(principal));
+    autoconfig_glob = JS_NewGlobalObject(autoconfig_cx, &global_class, nsJSPrincipals::get(principal));
     if (autoconfig_glob) {
         JSAutoCompartment ac(autoconfig_cx, autoconfig_glob);
         if (JS_InitStandardClasses(autoconfig_cx, autoconfig_glob)) {