Convert WindowOpenDisposition to an enum class.

chrome/browser/ui/tab_contents/core_tab_helper.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/tab_contents/core_tab_helper.h"
 
 #include <string>
 #include <vector>
 
 #include "base/bind.h"
@@ skipping 363 matching lines @@
   search_args.image_thumbnail_content = thumbnail_data;
   search_args.image_url = src_url;
   search_args.image_original_size = original_size;
   TemplateURLRef::PostContent post_content;
   GURL result(default_provider->image_url_ref().ReplaceSearchTerms(
       search_args, template_url_service->search_terms_data(), &post_content));
   if (!result.is_valid())
     return;
 
   content::OpenURLParams open_url_params(
-      result, content::Referrer(), NEW_FOREGROUND_TAB,
+      result, content::Referrer(), WindowOpenDisposition::NEW_FOREGROUND_TAB,
       ui::PAGE_TRANSITION_LINK, false);
   const std::string& content_type = post_content.first;
   const std::string& post_data = post_content.second;
   if (!post_data.empty()) {
     DCHECK(!content_type.empty());
     open_url_params.uses_post = true;
     open_url_params.post_data = content::ResourceRequestBody::CreateFromBytes(
         post_data.data(), post_data.size());
     open_url_params.extra_headers += base::StringPrintf(
         "%s: %s\r\n", net::HttpRequestHeaders::kContentType,
         content_type.c_str());
   }
   web_contents()->OpenURL(open_url_params);
 }