Remove support for the keygen tag

content/public/browser/content_browser_client.h

 // 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.
 
 #ifndef CONTENT_PUBLIC_BROWSER_CONTENT_BROWSER_CLIENT_H_
 #define CONTENT_PUBLIC_BROWSER_CONTENT_BROWSER_CLIENT_H_
 
 #include <stddef.h>
 
 #include <map>
@@ skipping 369 matching lines @@
 
 #if BUILDFLAG(ENABLE_WEBRTC)
   // Allow the embedder to control if WebRTC identities are allowed to be cached
   // and potentially reused for future requests (within the same origin).
   // This is called on the IO thread.
   virtual bool AllowWebRTCIdentityCache(const GURL& url,
                                         const GURL& first_party_url,
                                         ResourceContext* context);
 #endif  // BUILDFLAG(ENABLE_WEBRTC)
 
-  // Allow the embedder to control whether we can use <keygen>.
-  virtual bool AllowKeygen(const GURL& url, content::ResourceContext* context);
-
   // Allow the embedder to control whether we can use Web Bluetooth.
   // TODO(crbug.com/589228): Replace this with a use of the permission system.
   enum class AllowWebBluetoothResult {
     ALLOW,
     BLOCK_POLICY,
     BLOCK_GLOBALLY_DISABLED,
   };
   virtual AllowWebBluetoothResult AllowWebBluetooth(
       content::BrowserContext* browser_context,
       const url::Origin& requesting_origin,
@@ skipping 413 matching lines @@
   virtual bool ShouldRedirectDOMStorageTaskRunner();
 
   // If this returns true, all BrowserThreads (but UI/IO) that support it on
   // this platform will experimentally be redirected to TaskScheduler.
   virtual bool RedirectNonUINonIOBrowserThreadsToTaskScheduler();
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_CONTENT_BROWSER_CLIENT_H_