Changing SpawnChild to return a struct.

mojo/edk/embedder/pending_process_connection.h

 // Copyright 2017 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_EDK_EMBEDDER_PENDING_PROCESS_CONNECTION_H_
 #define MOJO_EDK_EMBEDDER_PENDING_PROCESS_CONNECTION_H_
 
 #include <string>
 
 #include "base/callback.h"
 #include "base/macros.h"
 #include "base/process/process_handle.h"
+#include "mojo/edk/embedder/connection_param.h"
 #include "mojo/edk/embedder/scoped_platform_handle.h"
 #include "mojo/edk/system/system_impl_export.h"
 #include "mojo/public/cpp/system/message_pipe.h"
 
 namespace mojo {
 namespace edk {
 
 using ProcessErrorCallback = base::Callback<void(const std::string& error)>;
 
 // Represents a potential connection to an external process. Use this object
@@ skipping 58 matching lines @@
   //
   // NOTES: This may be called any number of times to create multiple message
   // pipes to the same remote process. This call ALWAYS succeeds, returning
   // a valid message pipe handle and populating |*token| with a new unique
   // string value.
   ScopedMessagePipeHandle CreateMessagePipe(std::string* token);
 
   // Connects to the process. This must be called at most once, with the process
   // handle in |process|.
   //
-  // |channel| is the platform handle of an OS pipe which can be used to
-  // communicate with the connected process. The other end of that pipe must
+  // |connection_param| is the platform handle of an OS pipe which can be used
+  // to communicate with the connected process. The other end of that pipe must
   // ultimately be passed to mojo::edk::SetParentPipeHandle in the remote
   // process, and getting that end of the pipe into the other process is the
   // embedder's responsibility.
   //
   // If this method is not called by the time the PendingProcessConnection is
   // destroyed, it's assumed that the process is unavailable (e.g. process
   // launch failed or the process has otherwise been terminated early), and
   // any associated resources, such as remote endpoints of messages pipes
   // created by CreateMessagePipe above) will be cleaned up at that time.
   void Connect(
       base::ProcessHandle process,
-      ScopedPlatformHandle channel,
+      ConnectionParam connection_param,
       const ProcessErrorCallback& error_callback = ProcessErrorCallback());
 
  private:
   // A GUID representing a potential new process to be connected to this one.
   const std::string process_token_;
 
   // Indicates whether this object has been used to create new message pipes.
   bool has_message_pipes_ = false;
 
   // Indicates whether Connect() has been called yet.
   bool connected_ = false;
 
   DISALLOW_COPY_AND_ASSIGN(PendingProcessConnection);
 };
 
 }  // namespace edk
 }  // namespace mojo
 
 #endif  // MOJO_EDK_EMBEDDER_PENDING_PROCESS_CONNECTION_H_