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

chrome/service/service_main.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 "base/message_loop.h"
+#include "chrome/common/chrome_constants.h"
+#include "chrome/common/chrome_switches.h"
+#include "chrome/common/main_function_params.h"
+#include "chrome/service/cloud_print/cloud_print_proxy.h"
+#include "chrome/service/service_process.h"
+
+// Mainline routine for running as the service process.
+int ServiceProcessMain(const MainFunctionParams& parameters) {
+  MessageLoopForUI main_message_loop;
+  std::wstring app_name = chrome::kBrowserAppName;
+  PlatformThread::SetName(WideToASCII(app_name + L"_ServiceMain").c_str());
+
+  ServiceProcess service_process;
+  service_process.Initialize();
+  if (parameters.command_line_.HasSwitch(switches::kEnableCloudPrintProxy)) {
+    std::string lsid =
+        parameters.command_line_.GetSwitchValueASCII(
+            switches::kServiceAccountLsid);
+    std::string proxy_id =
+        parameters.command_line_.GetSwitchValueASCII(
+            switches::kCloudPrintProxyId);
+    service_process.cloud_print_proxy()->EnableForUser(lsid, proxy_id);
+  }
+  MessageLoop::current()->Run();
+  service_process.Teardown();
+
+  return 0;
+}
+