Renderers should obtain browser InterfaceProvider by connecting to browser

services/shell/public/cpp/lib/interface_registry.cc

Index: services/shell/public/cpp/lib/interface_registry.cc
diff --git a/services/shell/public/cpp/lib/interface_registry.cc b/services/shell/public/cpp/lib/interface_registry.cc
index cb00cc9c739da738ff235926b6b7818c6965faf2..d5d90a8affe712ec4ed9156dc13bf586898a16e4 100644
--- a/services/shell/public/cpp/lib/interface_registry.cc
+++ b/services/shell/public/cpp/lib/interface_registry.cc
@@ -54,6 +54,13 @@ void InterfaceRegistry::ResumeBinding() {
   }
 }
 
+void InterfaceRegistry::GetInterfaceNames(
+    std::set<std::string>* interface_names) {
+  DCHECK(interface_names);
+  for (auto& entry : name_to_binder_)
+    interface_names->insert(entry.first);
+}
+
 // mojom::InterfaceProvider:
 void InterfaceRegistry::GetInterface(const mojo::String& interface_name,
                                      mojo::ScopedMessagePipeHandle handle) {