Mojo: Use InterfaceFactory<Interface> for service registration

mojo/public/cpp/application/interface_factory_with_context.h

Index: mojo/public/cpp/application/interface_factory_with_context.h
diff --git a/mojo/public/cpp/application/interface_factory_with_context.h b/mojo/public/cpp/application/interface_factory_with_context.h
new file mode 100644
index 0000000000000000000000000000000000000000..79b9fef9246e6aed5580530e9c09516386401ec2
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+++ b/mojo/public/cpp/application/interface_factory_with_context.h
@@ -0,0 +1,34 @@
+// 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_WITH_CONTEXT_H_
+#define MOJO_PUBLIC_CPP_APPLICATION_INTERFACE_FACTORY_WITH_CONTEXT_H_
+
+#include "mojo/public/cpp/application/interface_factory.h"
+
+namespace mojo {
+
+// Use this class to allocate and bind instances of Impl constructed with a
+// context parameter to interface requests. The lifetime of the constructed
+// Impls is bound to the pipe.
+template <typename Impl,
+          typename Context,
+          typename Interface = typename Impl::ImplementedInterface>
+class InterfaceFactoryWithContext : public InterfaceFactory<Interface> {
+ public:
+  explicit InterfaceFactoryWithContext(Context* context) : context_(context) {}
+  virtual ~InterfaceFactoryWithContext() {}
+
+  virtual void Create(ApplicationConnection* connection,
+                      InterfaceRequest<Interface> request) MOJO_OVERRIDE {
+    mojo::BindToRequest(new Impl(context_), &request);
+  }
+
+ private:
+  Context* context_;
+};
+
+}  // namespace mojo
+
+#endif  // MOJO_PUBLIC_CPP_APPLICATION_INTERFACE_FACTORY_WITH_CONTEXT_H_