Revert of Use a token to initialise ChannelMojo and MojoApplication everywhere.

content/common/in_process_child_thread_params.cc

 // 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.
 
 #include "content/common/in_process_child_thread_params.h"
 
 namespace content {
 
 InProcessChildThreadParams::InProcessChildThreadParams(
     const std::string& channel_name,
     scoped_refptr<base::SequencedTaskRunner> io_runner,
-    const std::string& ipc_token,
+    mojo::MessagePipeHandle handle,
     const std::string& application_token)
-    : channel_name_(channel_name), io_runner_(io_runner), ipc_token_(ipc_token),
+    : channel_name_(channel_name), io_runner_(io_runner), handle_(handle),
       application_token_(application_token) {}
 
 InProcessChildThreadParams::InProcessChildThreadParams(
     const InProcessChildThreadParams& other) = default;
 
 InProcessChildThreadParams::~InProcessChildThreadParams() {
 }
 
 }  // namespace content