Bug 918288 - Follow-up to fix non-unified build bustage. r=me

dom/ipc/TabChild.cpp

@@ -53,6 +53,7 @@
 #include "nsIDOMWindow.h"
 #include "nsIDOMWindowUtils.h"
 #include "nsIDocShell.h"
+#include "nsIFrame.h"
 #include "nsIURI.h"
 #include "nsIURIFixup.h"
 #include "nsCDefaultURIFixup.h"