Created a new process type called the service process to host background task...

chrome/service/service_process.cc

+// Copyright (c) 2010 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 "chrome/service/service_process.h"
+
+#include "chrome/service/cloud_print/cloud_print_proxy.h"
+
+ServiceProcess* g_service_process = NULL;
+
+ServiceProcess::ServiceProcess() {
+  DCHECK(!g_service_process);
+  g_service_process = this;
+}
+
+bool ServiceProcess::Initialize() {
+  base::Thread::Options options;
+  options.message_loop_type = MessageLoop::TYPE_IO;
+  io_thread_.reset(new base::Thread("ServiceProcess_IO"));
+  file_thread_.reset(new base::Thread("ServiceProcess_File"));
+  if (!io_thread_->StartWithOptions(options) ||
+      !file_thread_->StartWithOptions(options)) {
+    NOTREACHED();
+    Teardown();
+    return false;
+  }
+  return true;
+}
+
+bool ServiceProcess::Teardown() {
+  io_thread_.reset();
+  file_thread_.reset();
+  return true;
+}
+
+CloudPrintProxy* ServiceProcess::cloud_print_proxy() {
+  if (!cloud_print_proxy_.get()) {
+    cloud_print_proxy_.reset(new CloudPrintProxy());
+    cloud_print_proxy_->Initialize();
+  }
+  return cloud_print_proxy_.get();
+}
+
+ServiceProcess::~ServiceProcess() {
+  Teardown();
+  g_service_process = NULL;
+}
+