Add a instance groups to Connect(), and introduce an Identity struct.

media/mojo/services/mojo_media_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 MEDIA_MOJO_SERVICES_MOJO_MEDIA_APPLICATION_H_
 #define MEDIA_MOJO_SERVICES_MOJO_MEDIA_APPLICATION_H_
 
 #include "base/callback.h"
 #include "base/memory/ref_counted.h"
 #include "media/mojo/interfaces/service_factory.mojom.h"
@@ skipping 10 matching lines @@
 class MojoMediaApplication
     : public mojo::ShellClient,
       public mojo::InterfaceFactory<interfaces::ServiceFactory> {
  public:
   explicit MojoMediaApplication(scoped_ptr<MojoMediaClient> mojo_media_client);
   ~MojoMediaApplication() final;
 
  private:
   // mojo::ShellClient implementation.
   void Initialize(mojo::Connector* connector,
-                  const std::string& url,
-                  const std::string& user_id,
+                  const mojo::Identity& identity,
                   uint32_t id) final;
   bool AcceptConnection(mojo::Connection* connection) final;
 
   // mojo::InterfaceFactory<interfaces::ServiceFactory> implementation.
   void Create(mojo::Connection* connection,
               mojo::InterfaceRequest<interfaces::ServiceFactory> request) final;
 
   // Note: Since each instance runs on a different thread, do not share a common
   // MojoMediaClient with other instances to avoid threading issues. Hence using
   // a scoped_ptr here.
   scoped_ptr<MojoMediaClient> mojo_media_client_;
 
   mojo::Connector* connector_;
   scoped_refptr<MediaLog> media_log_;
   mojo::MessageLoopRefFactory ref_factory_;
 };
 
 }  // namespace media
 
 #endif  // MEDIA_MOJO_SERVICES_MOJO_MEDIA_APPLICATION_H_