Use Binding instead of InterfaceImpl for ExampleService.

examples/apptest/example_service_application.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_EXAMPLES_TEST_EXAMPLE_SERVICE_APPLICATION_H_
 #define MOJO_EXAMPLES_TEST_EXAMPLE_SERVICE_APPLICATION_H_
 
 #include "examples/apptest/example_service_impl.h"
 #include "mojo/public/cpp/application/application_delegate.h"
-#include "mojo/public/cpp/application/interface_factory_impl.h"
+#include "mojo/public/cpp/application/interface_factory.h"
 #include "mojo/public/cpp/system/macros.h"
 
 namespace mojo {
 
 class ApplicationConnection;
 
-class ExampleServiceApplication : public ApplicationDelegate {
+class ExampleServiceApplication : public ApplicationDelegate,
+                                  public InterfaceFactory<ExampleService> {
  public:
   ExampleServiceApplication();
-  virtual ~ExampleServiceApplication();
+  ~ExampleServiceApplication() override;
 
  private:
   // ApplicationDelegate implementation.
-  virtual bool ConfigureIncomingConnection(
+  bool ConfigureIncomingConnection(
       ApplicationConnection* connection) override;
 
-  InterfaceFactoryImpl<ExampleServiceImpl> example_service_factory_;

[msw, 2014/11/17 21:42:36]

Question: Do we want an InterfaceFactory implementation that supports simple
implementation binding cases like this? I could add something like
interface_factory_impl.h's InterfaceFactoryImpl, that instantiates the Impl and
passes the InterfaceRequest (or ScopedMessagePipeHandle as cited by binding.h?)
to the Impl's ctor.

[jamesr, 2014/11/17 22:33:04]

Maybe. I think the way to evaluate whether helpers like this pull their weight
is to look at how many places would user a helper of a particular form. That'll
be easier to assess when more things are ported from using InterfaceImpl to
using Binding<>.

[msw, 2014/11/17 23:05:32]

Acknowledged, I'll hold off on this.

+  // InterfaceFactory<ExampleService> implementation.
+  void Create(ApplicationConnection* connection,
+              InterfaceRequest<ExampleService> request) override;
 
   MOJO_DISALLOW_COPY_AND_ASSIGN(ExampleServiceApplication);
 };
 
 }  // namespace mojo
 
 #endif  // MOJO_EXAMPLES_TEST_EXAMPLE_SERVICE_APPLICATION_H_