Remove support for the keygen tag

content/renderer/renderer_blink_platform_impl.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 "content/renderer/renderer_blink_platform_impl.h"
 
 #include <memory>
 #include <utility>
 
 #include "base/command_line.h"
@@ skipping 764 matching lines @@
 }
 
 //------------------------------------------------------------------------------
 
 blink::WebPublicSuffixList* RendererBlinkPlatformImpl::publicSuffixList() {
   return &public_suffix_list_;
 }
 
 //------------------------------------------------------------------------------
 
-blink::WebString RendererBlinkPlatformImpl::signedPublicKeyAndChallengeString(
-    unsigned key_size_index,
-    const blink::WebString& challenge,
-    const blink::WebURL& url,
-    const blink::WebURL& top_origin) {
-  std::string signed_public_key;
-  RenderThread::Get()->Send(new RenderProcessHostMsg_Keygen(
-      static_cast<uint32_t>(key_size_index), challenge.utf8(), GURL(url),
-      GURL(top_origin), &signed_public_key));
-  return WebString::fromUTF8(signed_public_key);
-}
-
-//------------------------------------------------------------------------------
-
 blink::WebScrollbarBehavior* RendererBlinkPlatformImpl::scrollbarBehavior() {
   return web_scrollbar_behavior_.get();
 }
 
 //------------------------------------------------------------------------------
 
 WebBlobRegistry* RendererBlinkPlatformImpl::getBlobRegistry() {
   // blob_registry_ can be NULL when running some tests.
   return blob_registry_.get();
 }
@@ skipping 490 matching lines @@
   return &trial_token_validator_;
 }
 
 void RendererBlinkPlatformImpl::workerContextCreated(
     const v8::Local<v8::Context>& worker) {
   GetContentClient()->renderer()->DidInitializeWorkerContextOnWorkerThread(
       worker);
 }
 
 }  // namespace content