Allow trusted brokers to restrict connections for spawned applications to whitelisted applications …

mojo/application/public/cpp/lib/service_registry.h

Index: mojo/application/public/cpp/lib/service_registry.h
diff --git a/mojo/application/public/cpp/lib/service_registry.h b/mojo/application/public/cpp/lib/service_registry.h
index dcca5a04c70bba2dc520deb274fa4babfd8b4eb3..7ff737b8c0a3c2aa0930ba50de330e6b478b8653 100644
--- a/mojo/application/public/cpp/lib/service_registry.h
+++ b/mojo/application/public/cpp/lib/service_registry.h
@@ -5,6 +5,7 @@
 #ifndef MOJO_APPLICATION_PUBLIC_CPP_LIB_SERVICE_REGISTRY_H_
 #define MOJO_APPLICATION_PUBLIC_CPP_LIB_SERVICE_REGISTRY_H_
 
+#include <set>
 #include <string>
 
 #include "mojo/application/public/cpp/application_connection.h"
@@ -24,11 +25,15 @@ namespace internal {
 class ServiceRegistry : public ServiceProvider, public ApplicationConnection {
  public:
   ServiceRegistry();
+  // |allowed_interfaces| are the set of interfaces that the shell has allowed
+  // an application to expose to another application. If this set is empty, the
+  // application is allowed to expose all of its interfaces.
   ServiceRegistry(ApplicationImpl* application_impl,
                   const std::string& connection_url,
                   const std::string& remote_url,
                   ServiceProviderPtr remote_services,
-                  InterfaceRequest<ServiceProvider> local_services);
+                  InterfaceRequest<ServiceProvider> local_services,
+                  const std::set<std::string>& allowed_interfaces);
 
   // ApplicationConnection overrides.
   void SetServiceConnector(ServiceConnector* service_connector) override;
@@ -57,6 +62,8 @@ class ServiceRegistry : public ServiceProvider, public ApplicationConnection {
   Binding<ServiceProvider> local_binding_;
   ServiceProviderPtr remote_service_provider_;
   ServiceConnectorRegistry service_connector_registry_;
+  const std::set<std::string> allowed_interfaces_;
+  const bool allow_all_interfaces_;
 
   MOJO_DISALLOW_COPY_AND_ASSIGN(ServiceRegistry);
 };