If possible, use the PathService instead of the --user-data-dir flag directly

cloud_print/service/win/cloud_print_service.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.
 
 // Work around warning in atlbase.h
 // https://connect.microsoft.com/VisualStudio/feedback/details/1032199/atlbase-h-gives-warning-c4189-when-compiling-with-atl-no-com-support
 #pragma warning(push)
 #pragma warning(disable:4189)
 #include <atlbase.h>
 #pragma warning(pop)
@@ skipping 10 matching lines @@
 #include "base/callback_helpers.h"
 #include "base/command_line.h"
 #include "base/files/file_util.h"
 #include "base/guid.h"
 #include "base/logging.h"
 #include "base/path_service.h"
 #include "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/win/scoped_handle.h"
 #include "chrome/common/chrome_constants.h"
+#include "chrome/common/chrome_paths.h"
 #include "chrome/common/chrome_switches.h"
 #include "cloud_print/common/win/cloud_print_utils.h"
 #include "cloud_print/service/service_constants.h"
 #include "cloud_print/service/service_state.h"
 #include "cloud_print/service/service_switches.h"
 #include "cloud_print/service/win/chrome_launcher.h"
 #include "cloud_print/service/win/service_controller.h"
 #include "cloud_print/service/win/service_listener.h"
 #include "cloud_print/service/win/service_utils.h"
 #include "cloud_print/service/win/setup_listener.h"
@@ skipping 161 matching lines @@
     return Base::PostMessageLoop();
   }
 
  private:
   HRESULT ParseCommandLine(const base::CommandLine& command_line,
                            bool* is_service) {
     if (!is_service)
       return E_INVALIDARG;
     *is_service = false;
 
-    user_data_dir_switch_ =

[grt (UTC plus 2), 2015/03/26 18:36:22]

leave this one alone, too

[noms (inactive), 2015/03/30 14:06:33]

Done.

-        command_line.GetSwitchValuePath(switches::kUserDataDir);
+    PathService::Get(chrome::DIR_USER_DATA, &user_data_dir_switch_);
     if (!user_data_dir_switch_.empty())
       user_data_dir_switch_ = base::MakeAbsoluteFilePath(user_data_dir_switch_);
 
     if (command_line.HasSwitch(kStopSwitch))
       return controller_->StopService();
 
     if (command_line.HasSwitch(kUninstallSwitch))
       return controller_->UninstallService();
 
     if (command_line.HasSwitch(kInstallSwitch)) {
@@ skipping 193 matching lines @@
   settings.logging_dest = logging::LOG_TO_SYSTEM_DEBUG_LOG;
   logging::InitLogging(settings);
 
   logging::SetMinLogLevel(
       command_line->HasSwitch(switches::kEnableLogging) ?
       logging::LOG_INFO : logging::LOG_FATAL);
 
   return _AtlModule.WinMain(0);
 }