Make browser process a singleton service

services/service_manager/public/cpp/interface_registry.h

Index: services/service_manager/public/cpp/interface_registry.h
diff --git a/services/service_manager/public/cpp/interface_registry.h b/services/service_manager/public/cpp/interface_registry.h
index e9851f93aa57f95309974f2ea46d9db834e7b929..96e23a764435ec4af7a4b0b0da3534dedfaba639 100644
--- a/services/service_manager/public/cpp/interface_registry.h
+++ b/services/service_manager/public/cpp/interface_registry.h
@@ -165,6 +165,10 @@ class InterfaceRegistry : public mojom::InterfaceProvider {
   // have been deleted.
   void AddConnectionLostClosure(const base::Closure& connection_lost_closure);
 
+  // Binds a local interface request.
+  void BindInterface(const std::string& name,
+                     mojo::ScopedMessagePipeHandle handle);
+
  private:
   using InterfaceNameToBinderMap =
       std::map<std::string, std::unique_ptr<InterfaceBinder>>;