Remove support for the keygen tag

chrome/browser/chrome_content_browser_client.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/chrome_content_browser_client.h"
 
 #include <map>
 #include <set>
 #include <utility>
 #include <vector>
@@ skipping 2081 matching lines @@
     content::ResourceContext* context) {
   DCHECK_CURRENTLY_ON(BrowserThread::IO);
   ProfileIOData* io_data = ProfileIOData::FromResourceContext(context);
   content_settings::CookieSettings* cookie_settings =
       io_data->GetCookieSettings();
   return cookie_settings->IsReadingCookieAllowed(url, first_party_url) &&
          cookie_settings->IsSettingCookieAllowed(url, first_party_url);
 }
 #endif  // BUILDFLAG(ENABLE_WEBRTC)
 
-bool ChromeContentBrowserClient::AllowKeygen(
-    const GURL& url,
-    content::ResourceContext* context) {
-  HostContentSettingsMap* content_settings =
-      ProfileIOData::FromResourceContext(context)->GetHostContentSettingsMap();
-
-  return content_settings->GetContentSetting(
-             url, url, CONTENT_SETTINGS_TYPE_KEYGEN, std::string()) ==
-         CONTENT_SETTING_ALLOW;
-}
-
 ChromeContentBrowserClient::AllowWebBluetoothResult
 ChromeContentBrowserClient::AllowWebBluetooth(
     content::BrowserContext* browser_context,
     const url::Origin& requesting_origin,
     const url::Origin& embedding_origin) {
   // TODO(crbug.com/598890): Don't disable if
   // base::CommandLine::ForCurrentProcess()->
   // HasSwitch(switches::kEnableWebBluetooth) is true.
   if (variations::GetVariationParamValue(
           PermissionContextBase::kPermissionsKillSwitchFieldStudy,
@@ skipping 1255 matching lines @@
 bool ChromeContentBrowserClient::ShouldRedirectDOMStorageTaskRunner() {
   return variations::GetVariationParamValue(
              "BrowserScheduler", "RedirectDOMStorageTaskRunner") == "true";
 }
 
 bool ChromeContentBrowserClient::
     RedirectNonUINonIOBrowserThreadsToTaskScheduler() {
   return variations::GetVariationParamValue(
              "BrowserScheduler", "RedirectNonUINonIOBrowserThreads") == "true";
 }