Avoid a thread hop when initializing IPC to new processes

content/browser/child_process_launcher_helper_mac.cc

 // 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.
 
 #include "base/memory/ptr_util.h"
 #include "base/posix/global_descriptors.h"
 #include "content/browser/bootstrap_sandbox_manager_mac.h"
 #include "content/browser/child_process_launcher.h"
 #include "content/browser/child_process_launcher_helper.h"
 #include "content/browser/child_process_launcher_helper_posix.h"
@@ skipping 62 matching lines @@
   // options now owns the pre_exec_delegate which will be delete on
   // AfterLaunchOnLauncherThread below.
   options->pre_exec_delegate = pre_exec_delegate.release();
 }
 
 ChildProcessLauncherHelper::Process
 ChildProcessLauncherHelper::LaunchProcessOnLauncherThread(
     const base::LaunchOptions& options,
     std::unique_ptr<FileDescriptorInfo> files_to_register,
     bool* is_synchronous_launch,
-    int* launch_result) {
+    int* launch_result,
+    std::unique_ptr<mojo::edk::PendingProcessConnection>* pending_connection,
+    mojo::edk::ScopedPlatformHandle* server_handle) {
   *is_synchronous_launch = true;
   ChildProcessLauncherHelper::Process process;
   process.process = base::LaunchProcess(*command_line(), options);
   *launch_result = process.process.IsValid() ? LAUNCH_RESULT_SUCCESS
                                              : LAUNCH_RESULT_FAILURE;
   return process;
 }
 
 void ChildProcessLauncherHelper::AfterLaunchOnLauncherThread(
     const ChildProcessLauncherHelper::Process& process,
@@ skipping 47 matching lines @@
 
 // static
 void ChildProcessLauncherHelper::SetProcessBackgroundedOnLauncherThread(
       base::Process process, bool background) {
   if (process.CanBackgroundProcesses())
     process.SetProcessBackgrounded(MachBroker::GetInstance(), background);
 }
 
 }  //  namespace internal
 }  // namespace content