Remove support for the keygen tag

chrome/browser/ui/webui/settings/site_settings_handler.cc

 // Copyright 2016 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/settings/site_settings_handler.h"
 
 #include <algorithm>
 #include <memory>
 #include <string>
 #include <utility>
@@ skipping 517 matching lines @@
     CONTENT_SETTINGS_TYPE_IMAGES,
     CONTENT_SETTINGS_TYPE_JAVASCRIPT,
     CONTENT_SETTINGS_TYPE_PLUGINS,
     CONTENT_SETTINGS_TYPE_POPUPS,
     CONTENT_SETTINGS_TYPE_GEOLOCATION,
     CONTENT_SETTINGS_TYPE_NOTIFICATIONS,
     CONTENT_SETTINGS_TYPE_MEDIASTREAM_MIC,
     CONTENT_SETTINGS_TYPE_MEDIASTREAM_CAMERA,
     CONTENT_SETTINGS_TYPE_PROTOCOL_HANDLERS,
     CONTENT_SETTINGS_TYPE_AUTOMATIC_DOWNLOADS,
-    CONTENT_SETTINGS_TYPE_KEYGEN,
     CONTENT_SETTINGS_TYPE_BACKGROUND_SYNC,
     CONTENT_SETTINGS_TYPE_USB_CHOOSER_DATA,
     CONTENT_SETTINGS_TYPE_PROMPT_NO_DECISION_COUNT,
   };
 
   // Create a list to be consistent with existing API, we are expecting a single
   // element (or none).
   std::unique_ptr<base::ListValue> exceptions(new base::ListValue);
   for (size_t type = 0; type < arraysize(kSettingsDetailTypes); ++type) {
     ContentSettingsType content_type = kSettingsDetailTypes[type];
@@ skipping 160 matching lines @@
     origin = content::kUnreachableWebDataURL;
   }
 
   content::HostZoomMap* host_zoom_map;
   host_zoom_map = content::HostZoomMap::GetDefaultForBrowserContext(profile_);
   double default_level = host_zoom_map->GetDefaultZoomLevel();
   host_zoom_map->SetZoomLevelForHost(origin, default_level);
 }
 
 }  // namespace settings