Fix PreRunValidation calls in two of UIThreadExtensionFunction's subclasses.

extensions/browser/api/app_current_window_internal/app_current_window_internal_api.cc

Index: extensions/browser/api/app_current_window_internal/app_current_window_internal_api.cc
diff --git a/extensions/browser/api/app_current_window_internal/app_current_window_internal_api.cc b/extensions/browser/api/app_current_window_internal/app_current_window_internal_api.cc
index d28a50f4049bededff39970bb4a733c54713e9ad..74f6c9d30bcf428fe50b875e0f7902cd5b099b49 100644
--- a/extensions/browser/api/app_current_window_internal/app_current_window_internal_api.cc
+++ b/extensions/browser/api/app_current_window_internal/app_current_window_internal_api.cc
@@ -122,6 +122,9 @@ BoundsType GetBoundsType(const std::string& type_as_string) {
 
 bool AppCurrentWindowInternalExtensionFunction::PreRunValidation(
     std::string* error) {
+  if (!UIThreadExtensionFunction::PreRunValidation(error))
+    return false;
+
   AppWindowRegistry* registry = AppWindowRegistry::Get(browser_context());
   DCHECK(registry);
   content::WebContents* web_contents = GetSenderWebContents();