alternate shape for content handler boilerplate

mojo/application/content_handler.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_APPLICATION_CONTENT_HANDLER_H_
 #define MOJO_APPLICATION_CONTENT_HANDLER_H_
 
-#include "base/callback.h"
 #include "mojo/public/c/system/core.h"
 #include "mojo/public/cpp/application/application_delegate.h"
+#include "mojo/public/cpp/application/interface_factory.h"
+#include "mojo/public/cpp/bindings/callback.h"
 #include "mojo/public/interfaces/application/application.mojom.h"
 #include "mojo/public/interfaces/application/shell.mojom.h"
+#include "mojo/services/public/interfaces/content_handler/content_handler.mojom.h"
 #include "mojo/services/public/interfaces/network/url_loader.mojom.h"
 
 namespace mojo {
 
-class ContentHandlerDelegate : public ApplicationDelegate {
+class ContentHandlerFactory : public InterfaceFactory<ContentHandler> {
  public:
-  ContentHandlerDelegate() {}
-  // Implement this method to create the ApplicationDelegate for the given
-  // content. The application will be run on its own thread.
-  virtual scoped_ptr<mojo::InterfaceImpl<mojo::Application>> CreateApplication(
-      ShellPtr shell,
-      URLResponsePtr response) = 0;
+  class Delegate {
+   public:
+    virtual ~Delegate() {}
+    virtual ApplicationDelegate* CreateApplication(URLResponsePtr response) = 0;
+  };
+
+  ContentHandlerFactory(Delegate* delegate);
+  virtual ~ContentHandlerFactory();
+
+  virtual void Create(ApplicationConnection* connection,
+                      InterfaceRequest<ContentHandler> request) override;
 
  private:
-  DISALLOW_COPY_AND_ASSIGN(ContentHandlerDelegate);
+  Delegate* delegate_;
 };
 
-// A utility for running a chromium based mojo Application that expose a content
-// handler. The typical use case is to use when writing your MojoMain:
-//
-// MojoResult MojoMain(MojoHandle shell_handle) {
-//   return mojo::ContentHandlerRunner::Run(shell_handle,
-//                                          make_scoped_ptr(new MyDelegate));
-// }
-class ContentHandlerRunner {
- public:
-  static MojoResult Run(MojoHandle shell_handle,
-                        scoped_ptr<ContentHandlerDelegate> delegate);
-
- private:
-  ContentHandlerRunner() {}
-};
 
 }  // namespace mojo
 
 #endif  // MOJO_APPLICATION_CONTENT_HANDLER_H_