[Extensions] Expand bindings access checks

extensions/renderer/display_source_custom_bindings.cc

Index: extensions/renderer/display_source_custom_bindings.cc
diff --git a/extensions/renderer/display_source_custom_bindings.cc b/extensions/renderer/display_source_custom_bindings.cc
index 1a021c157b3f0701159522b4a4de78b1e447be29..a933297b22ddcfb2d347915fa5237b6b982a9211 100644
--- a/extensions/renderer/display_source_custom_bindings.cc
+++ b/extensions/renderer/display_source_custom_bindings.cc
@@ -29,10 +29,10 @@ const char kSessionNotFound[] = "Session not found";
 DisplaySourceCustomBindings::DisplaySourceCustomBindings(ScriptContext* context)
     : ObjectBackedNativeHandler(context),
       weak_factory_(this) {
-  RouteFunction("StartSession",
+  RouteFunction("StartSession", "displaySource",
                 base::Bind(&DisplaySourceCustomBindings::StartSession,
                            weak_factory_.GetWeakPtr()));
-  RouteFunction("TerminateSession",
+  RouteFunction("TerminateSession", "displaySource",
                 base::Bind(&DisplaySourceCustomBindings::TerminateSession,
                            weak_factory_.GetWeakPtr()));
 }