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

mojo/shell/connect_params.h

 // Copyright 2015 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_SHELL_CONNECT_PARAMS_H_
 #define MOJO_SHELL_CONNECT_PARAMS_H_
 
 #include <string>
 #include <utility>
 
 #include "base/callback.h"
 #include "base/macros.h"
 #include "mojo/public/cpp/bindings/interface_request.h"
-#include "mojo/shell/identity.h"
+#include "mojo/shell/public/cpp/identity.h"
 #include "mojo/shell/public/interfaces/connector.mojom.h"
 #include "mojo/shell/public/interfaces/interface_provider.mojom.h"
 
 namespace mojo {
 namespace shell {
 
 // This class represents a request for the application manager to connect to an
 // application.
 class ConnectParams {
  public:
-   ConnectParams();
-   ~ConnectParams();
+  ConnectParams();
+  ~ConnectParams();
 
   void set_source(const Identity& source) { source_ = source;  }
   const Identity& source() const { return source_; }
   void set_target(const Identity& target) { target_ = target; }
   const Identity& target() const { return target_; }
 
   void set_remote_interfaces(shell::mojom::InterfaceProviderRequest value) {
     remote_interfaces_ = std::move(value);
   }
   shell::mojom::InterfaceProviderRequest TakeRemoteInterfaces() {
@@ skipping 26 matching lines @@
   shell::mojom::InterfaceProviderPtr local_interfaces_;
   shell::mojom::Connector::ConnectCallback connect_callback_;
 
   DISALLOW_COPY_AND_ASSIGN(ConnectParams);
 };
 
 }  // namespace shell
 }  // namespace mojo
 
 #endif  // MOJO_SHELL_CONNECT_PARAMS_H_