Mojo: Use InterfaceFactory<Interface> for service registration

mojo/public/cpp/application/interface_factory.h

+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef MOJO_PUBLIC_CPP_APPLICATION_INTERFACE_FACTORY_H_
+#define MOJO_PUBLIC_CPP_APPLICATION_INTERFACE_FACTORY_H_
+
+#include "mojo/public/cpp/bindings/interface_impl.h"
+#include "mojo/public/cpp/bindings/interface_request.h"
+
+namespace mojo {
+
+class ApplicationConnection;
+template <typename Interface> class InterfaceRequest;
+
+// Implement this class to provide implementations of a given interface and
+// bind them to incoming requests. The implementation of this class is
+// responsible for managing the lifetime of the implementations of the
+// interface.
+template <typename Interface>
+class InterfaceFactory {
+ public:
+  virtual ~InterfaceFactory() {}
+  virtual void Create(ApplicationConnection* connection,
+                      InterfaceRequest<Interface> request) = 0;
+};
+
+}  // namespace mojo
+
+#endif  // MOJO_PUBLIC_CPP_APPLICATION_INTERFACE_FACTORY_H_