Mojo: Use InterfaceFactory<Interface> for service registration

mojo/public/cpp/application/context_interface_provider.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_APPLICATION_CONTEXT_INTERFACE_FACTORY_H_
+#define MOJO_PUBLIC_APPLICATION_CONTEXT_INTERFACE_FACTORY_H_
+
+#include "mojo/public/cpp/application/interface_provider.h"
+
+namespace mojo {
+
+// Use this class to allocate and bind instances of Impl constructed with a
+// context parameter response to requests for interface Interface.
+template <typename Impl,
+          typename Context,
+          typename Interface = typename Impl::Implements>
+class ContextInterfaceProvider : public InterfaceProvider<Interface> {

[jamesr, 2014/07/14 21:21:44]

this and DefaultInterfaceProvider (better name welcome!) are intended as helpers
for common situations but aren't properly speaking part of the public interface

+ public:
+  explicit ContextInterfaceProvider(Context* context) : context_(context) {}
+  virtual ~ContextInterfaceProvider() {}
+
+  virtual void BindToRequest(ApplicationConnection* connection,
+                             InterfaceRequest<Interface> request)
+      MOJO_OVERRIDE {
+    mojo::BindToRequest(new Impl(context_), &request);
+  }
+
+ private:
+  Context* context_;
+};
+
+}  // namespace mojo
+
+#endif  // MOJO_PUBLIC_APPLICATION_CONTEXT_INTERFACE_FACTORY_H_