Add an ApplicationConnector interface, etc.

mojo/public/cpp/application/connect.h

Index: mojo/public/cpp/application/connect.h
diff --git a/mojo/public/cpp/application/connect.h b/mojo/public/cpp/application/connect.h
index 964c55f8fb63830d3872848634553e86cced6022..fb47f5e660ddeecff2a98b06b53d2b54b334cea7 100644
--- a/mojo/public/cpp/application/connect.h
+++ b/mojo/public/cpp/application/connect.h
@@ -5,6 +5,7 @@
 #ifndef MOJO_PUBLIC_CPP_APPLICATION_CONNECT_H_
 #define MOJO_PUBLIC_CPP_APPLICATION_CONNECT_H_
 
+#include "mojo/public/interfaces/application/application_connector.mojom.h"
 #include "mojo/public/interfaces/application/service_provider.mojom.h"
 #include "mojo/public/interfaces/application/shell.mojom.h"
 
@@ -30,6 +31,17 @@ inline void ConnectToService(Shell* shell,
   ConnectToService(service_provider.get(), ptr);
 }
 
+// Binds |ptr| to a remote implementation of Interface from |application_url|.
+template <typename Interface>
+inline void ConnectToService(ApplicationConnector* application_connector,
+                             const std::string& application_url,
+                             InterfacePtr<Interface>* ptr) {
+  ServiceProviderPtr service_provider;
+  application_connector->ConnectToApplication(
+      application_url, GetProxy(&service_provider), nullptr);
+  ConnectToService(service_provider.get(), ptr);
+}
+
 }  // namespace mojo
 
 #endif  // MOJO_PUBLIC_CPP_APPLICATION_CONNECT_H_