Use valid /prefetch arguments for process launches on Windows. - do not submit

cloud_print/service/win/chrome_launcher.cc

 // Copyright (c) 2012 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 "cloud_print/service/win/chrome_launcher.h"
 
 #include <stddef.h>
 
 #include "base/base_switches.h"
 #include "base/command_line.h"
 #include "base/files/file_util.h"
 #include "base/files/scoped_temp_dir.h"
 #include "base/json/json_reader.h"
 #include "base/json/json_writer.h"
 #include "base/process/process.h"
 #include "base/values.h"
 #include "base/win/registry.h"
 #include "base/win/scoped_handle.h"
 #include "base/win/scoped_process_information.h"
 #include "chrome/common/chrome_constants.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/pref_names.h"
+#include "chrome/common/prefetch_argument_win.h"
 #include "chrome/installer/launcher_support/chrome_launcher_support.h"
 #include "cloud_print/common/win/cloud_print_utils.h"
 #include "cloud_print/service/service_constants.h"
 #include "cloud_print/service/win/service_utils.h"
 #include "components/browser_sync/common/browser_sync_switches.h"
 #include "components/cloud_devices/common/cloud_devices_urls.h"
 #include "content/public/common/content_switches.h"
 #include "google_apis/gaia/gaia_urls.h"
 #include "net/base/url_util.h"
 #include "url/gurl.h"
@@ skipping 171 matching lines @@
   while (1) {
     base::FilePath chrome_path =
         chrome_launcher_support::GetAnyChromePath(false /* is_sxs */);
 
     if (!chrome_path.empty()) {
       base::CommandLine cmd(chrome_path);
       CopyChromeSwitchesFromCurrentProcess(&cmd);
 
       // Required switches.
       cmd.AppendSwitchASCII(switches::kProcessType, switches::kServiceProcess);
+      chrome::AddWindowsPrefetchArgument(&cmd);
       cmd.AppendSwitchPath(switches::kUserDataDir, user_data_);
       cmd.AppendSwitch(switches::kNoServiceAutorun);
 
       // Optional.
       cmd.AppendSwitch(switches::kDisableDefaultApps);
       cmd.AppendSwitch(switches::kDisableExtensions);
       cmd.AppendSwitch(switches::kDisableGpu);
       cmd.AppendSwitch(switches::kDisableSoftwareRasterizer);
       cmd.AppendSwitch(switches::kDisableSync);
       cmd.AppendSwitch(switches::kNoFirstRun);
@@ skipping 100 matching lines @@
       LOG(ERROR) << "Chrome launch failed.";
       return std::string();
     }
     if (!json.empty()) {
       // Close chrome because Service State is ready.
       CloseChrome(chrome_process.Pass(), thread_id);
       return json;
     }
   }
 }