Convert WindowOpenDisposition to an enum class.

content/browser/frame_host/navigator_impl.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 "content/browser/frame_host/navigator_impl.h"
 
 #include <utility>
 
 #include "base/logging.h"
 #include "base/metrics/histogram_macros.h"
@@ skipping 685 matching lines @@
           current_site_instance, url)) {
     dest_url = GURL(url::kAboutBlankURL);
   }
 
   int frame_tree_node_id = -1;
 
   // Send the navigation to the current FrameTreeNode if it's destined for a
   // subframe in the current tab.  We'll assume it's for the main frame
   // (possibly of a new or different WebContents) otherwise.
   if (SiteIsolationPolicy::UseSubframeNavigationEntries() &&
-      disposition == CURRENT_TAB && render_frame_host->GetParent()) {
+      disposition == WindowOpenDisposition::CURRENT_TAB &&
+      render_frame_host->GetParent()) {
     frame_tree_node_id =
         render_frame_host->frame_tree_node()->frame_tree_node_id();
   }
 
   OpenURLParams params(dest_url, referrer, frame_tree_node_id, disposition,
                        ui::PAGE_TRANSITION_LINK,
                        true /* is_renderer_initiated */);
   params.uses_post = uses_post;
   params.post_data = body;
   params.source_site_instance = source_site_instance;
@@ skipping 491 matching lines @@
   if (pending_entry != controller_->GetVisibleEntry() ||
       !should_preserve_entry) {
     controller_->DiscardPendingEntry(true);
 
     // Also force the UI to refresh.
     controller_->delegate()->NotifyNavigationStateChanged(INVALIDATE_TYPE_URL);
   }
 }
 
 }  // namespace content