Revert of Adds the ability for the renderer to create the mojo channel

content/renderer/mojo/mojo_render_process_observer.cc

-// Copyright 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/renderer/mojo/mojo_render_process_observer.h"
-
-#include "base/message_loop/message_loop.h"
-#include "content/child/child_process.h"
-#include "content/common/mojo/mojo_channel_init.h"
-#include "content/common/mojo/mojo_messages.h"
-#include "content/public/renderer/render_thread.h"
-
-namespace content {
-
-MojoRenderProcessObserver::MojoRenderProcessObserver(
-    RenderThread* render_thread)
-    : render_thread_(render_thread) {
-  render_thread_->AddObserver(this);
-}
-
-bool MojoRenderProcessObserver::OnControlMessageReceived(
-    const IPC::Message& message) {
-  bool handled = true;
-  IPC_BEGIN_MESSAGE_MAP(MojoRenderProcessObserver, message)
-    IPC_MESSAGE_HANDLER(MojoMsg_ChannelCreated, OnChannelCreated)
-    IPC_MESSAGE_UNHANDLED(handled = false)
-  IPC_END_MESSAGE_MAP()
-  return handled;
-}
-
-void MojoRenderProcessObserver::OnRenderProcessShutdown() {
-  delete this;
-}
-
-MojoRenderProcessObserver::~MojoRenderProcessObserver() {
-  render_thread_->RemoveObserver(this);
-}
-
-void MojoRenderProcessObserver::OnChannelCreated(
-    const IPC::PlatformFileForTransit& file) {
-#if defined(OS_POSIX)
-  base::PlatformFile handle = file.fd;
-#elif defined(OS_WIN)
-  base::PlatformFile handle = file;
-#endif
-  DCHECK(!channel_init_.get());
-  channel_init_.reset(new MojoChannelInit);
-  channel_init_->Init(handle, ChildProcess::current()->io_message_loop_proxy());
-}
-
-}  // namespace content