1 files changed, 14 insertions, 0 deletions
diff --git a/toolkit/components/windowwatcher/test/head.js b/toolkit/components/windowwatcher/test/head.js
new file mode 100644
index 0000000000..911a56efac
--- /dev/null
+++ b/toolkit/components/windowwatcher/test/head.js
@@ -0,0 +1,14 @@
+/**
+ * Given some nsIDOMWindow for a window running in the parent
+ * process, return the nsIWebBrowserChrome chrome flags for
+ * the associated XUL window.
+ *
+ * @param win (nsIDOMWindow)
+ *        Some window in the parent process.
+ * @returns int
+ */
+function getParentChromeFlags(win) {
+  return win.docShell.treeOwner
+    .QueryInterface(Ci.nsIInterfaceRequestor)
+    .getInterface(Ci.nsIAppWindow).chromeFlags;
+}