Revert of Remove HostDesktopType from AppLaunchParams

chrome/browser/ui/ash/system_tray_delegate_chromeos.cc

 // Copyright 2013 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/browser/ui/ash/system_tray_delegate_chromeos.h"
 
 #include <stddef.h>
 #include <algorithm>
 #include <set>
 #include <string>
@@ skipping 498 matching lines @@
                                      kDisplayOverscanSettingsSubPageName));
 }
 
 void SystemTrayDelegateChromeOS::ShowIMESettings() {
   content::RecordAction(base::UserMetricsAction("OpenLanguageOptionsDialog"));
   ShowSettingsSubPageForActiveUser(chrome::kLanguageOptionsSubPage);
 }
 
 void SystemTrayDelegateChromeOS::ShowHelp() {
   chrome::ShowHelpForProfile(ProfileManager::GetActiveUserProfile(),
+                             chrome::HOST_DESKTOP_TYPE_ASH,
                              chrome::HELP_SOURCE_MENU);
 }
 
 void SystemTrayDelegateChromeOS::ShowAccessibilityHelp() {
   chrome::ScopedTabbedBrowserDisplayer displayer(
       ProfileManager::GetActiveUserProfile());
   accessibility::ShowAccessibilityHelp(displayer.browser());
 }
 
 void SystemTrayDelegateChromeOS::ShowAccessibilitySettings() {
@@ skipping 797 matching lines @@
   LOG(WARNING) << "SystemTrayDelegateChromeOS::GetChildUserMessage call while "
                << "ENABLE_SUPERVISED_USERS undefined.";
   return base::string16();
 }
 
 ash::SystemTrayDelegate* CreateSystemTrayDelegate() {
   return new SystemTrayDelegateChromeOS();
 }
 
 }  // namespace chromeos