Convert WindowOpenDisposition to an enum class.

chrome/browser/ui/webui/options/chromeos/cros_language_options_handler.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 "chrome/browser/ui/webui/options/chromeos/cros_language_options_handler.h"
 
 #include <stddef.h>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
@@ skipping 226 matching lines @@
 
   const input_method::InputMethodDescriptor* ime =
       input_method::InputMethodManager::Get()
           ->GetActiveIMEState()
           ->GetInputMethodFromId(input_method_id);
   if (!ime)
     return;
 
   Browser* browser = chrome::FindBrowserWithWebContents(
       web_ui()->GetWebContents());
-  content::OpenURLParams params(ime->options_page_url(),
-      content::Referrer(),
-      SINGLETON_TAB,
-      ui::PAGE_TRANSITION_LINK,
-      false);
+  content::OpenURLParams params(ime->options_page_url(), content::Referrer(),
+                                WindowOpenDisposition::SINGLETON_TAB,
+                                ui::PAGE_TRANSITION_LINK, false);
   browser->OpenURL(params);
 }
 
 void CrosLanguageOptionsHandler::AddImeProvider(base::ListValue* list) {
   Profile* profile = Profile::FromWebUI(web_ui());
   const extensions::ExtensionSet& enabled_extensions =
       extensions::ExtensionRegistry::Get(profile)->enabled_extensions();
   for (size_t i = 0; i < list->GetSize(); ++i) {
     base::DictionaryValue* entry;
     list->GetDictionary(i, &entry);
 
     std::string input_method_id;
     entry->GetString("id", &input_method_id);
 
     std::string extension_id =
         extension_ime_util::GetExtensionIDFromInputMethodID(input_method_id);
     const extensions::Extension* extension =
         enabled_extensions.GetByID(extension_id);
     if (extension)
       entry->SetString("extensionName", extension->name());
   }
 }
 
 }  // namespace options
 }  // namespace chromeos