Move Mojo channel initialization closer to IPC::Channel setup

content/common/mojo/mojo_channel_init.cc

 // Copyright (c) 2014 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/mojo/mojo_channel_init.h"
 
 #include "base/bind.h"
 #include "base/message_loop/message_loop.h"
 #include "mojo/embedder/embedder.h"
 
 namespace content {
 
 MojoChannelInit::MojoChannelInit()
     : channel_info_(NULL),
       weak_factory_(this) {
 }
 
 MojoChannelInit::~MojoChannelInit() {
-  bootstrap_message_pipe_.reset();
   if (channel_info_) {
     io_thread_task_runner_->PostTask(
         FROM_HERE,
         base::Bind(&mojo::embedder::DestroyChannelOnIOThread, channel_info_));
   }
 }
 
-void MojoChannelInit::Init(
+mojo::ScopedMessagePipeHandle MojoChannelInit::Init(
     base::PlatformFile file,
     scoped_refptr<base::TaskRunner> io_thread_task_runner) {
   DCHECK(!io_thread_task_runner_.get());  // Should only init once.
   io_thread_task_runner_ = io_thread_task_runner;
-  bootstrap_message_pipe_ = mojo::embedder::CreateChannel(
+  mojo::ScopedMessagePipeHandle message_pipe = mojo::embedder::CreateChannel(
       mojo::embedder::ScopedPlatformHandle(
           mojo::embedder::PlatformHandle(file)),
       io_thread_task_runner,
       base::Bind(&MojoChannelInit::OnCreatedChannel, weak_factory_.GetWeakPtr(),
                  io_thread_task_runner),
       base::MessageLoop::current()->message_loop_proxy()).Pass();
+  return message_pipe.Pass();
 }
 
 // static
 void MojoChannelInit::OnCreatedChannel(
     base::WeakPtr<MojoChannelInit> host,
     scoped_refptr<base::TaskRunner> io_thread,
     mojo::embedder::ChannelInfo* channel) {
   // By the time we get here |host| may have been destroyed. If so, shutdown the
   // channel.
   if (!host.get()) {
     io_thread->PostTask(
         FROM_HERE,
         base::Bind(&mojo::embedder::DestroyChannelOnIOThread, channel));
     return;
   }
   host->channel_info_ = channel;
 }
 
 
 }  // namespace content