[mojo-edk] Bind a child token to child launches and port reservations.

content/browser/mojo/mojo_child_connection.h

 // Copyright 2016 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 CONTENT_BROWSER_MOJO_MOJO_CHILD_CONNECTION_H_
 #define CONTENT_BROWSER_MOJO_MOJO_CHILD_CONNECTION_H_
 
 #include <memory>
 #include <string>
 
 #include "base/macros.h"
 #include "base/process/process_handle.h"
 #include "services/shell/public/interfaces/connector.mojom.h"
 
 namespace shell {
 class Connection;
 }
 
 namespace content {
 
 // Helper class to establish a connection between the shell and a single child
 // process. Process hosts can use this when launching new processes which
 // should be registered with the shell.
 class MojoChildConnection {
  public:
   // Prepares a new child connection for a child process which will be
   // identified to the shell as |application_name|. |instance_id| must be
   // unique among all child connections using the same |application_name|.
   MojoChildConnection(const std::string& application_name,
-                      const std::string& instance_id);
+                      const std::string& instance_id,
+                      const std::string& child_token);
   ~MojoChildConnection();
 
   shell::Connection* connection() const {
     return connection_.get();
   }
 
   // A token which must be passed to the child process via
   // |switches::kPrimordialPipeToken| in order for the child to initialize its
   // end of the shell connection pipe.
   std::string shell_client_token() const { return shell_client_token_; }
 
   // Sets the child connection's process handle. This should be called as soon
   // as the process has been launched, and the connection will not be fully
   // functional until this is called.
   void SetProcessHandle(base::ProcessHandle handle);
 
  private:
   const std::string shell_client_token_;
   std::unique_ptr<shell::Connection> connection_;
   shell::mojom::PIDReceiverPtr pid_receiver_;
 
   DISALLOW_COPY_AND_ASSIGN(MojoChildConnection);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_MOJO_MOJO_CHILD_CONNECTION_H_