diff --git a/chromecast/browser/cast_web_contents.h b/chromecast/browser/cast_web_contents.h
index c79b720..3a0e0a8 100644
--- a/chromecast/browser/cast_web_contents.h
+++ b/chromecast/browser/cast_web_contents.h
@@ -18,6 +18,7 @@
 #include "chromecast/browser/mojom/cast_web_contents.mojom.h"
 #include "chromecast/browser/web_types.h"
 #include "chromecast/common/mojom/feature_manager.mojom.h"
+#include "chromecast/mojo/interface_bundle.h"
 #include "content/public/common/media_playback_renderer_type.mojom.h"
 #include "mojo/public/cpp/bindings/generic_pending_receiver.h"
 #include "mojo/public/cpp/bindings/pending_receiver.h"
@@ -255,6 +256,9 @@
   // registry or any registered InterfaceProvider.
   virtual bool TryBindReceiver(mojo::GenericPendingReceiver& receiver) = 0;
 
+  // Locally-registered interfaces which are exposed to render frames.
+  virtual InterfaceBundle* local_interfaces() = 0;
+
   // Used for owner to pass its |InterfaceProvider| pointers to CastWebContents.
   // It is owner's responsibility to make sure each |InterfaceProvider| pointer
   // has distinct mojo interface set.