Update from chromium https://crrev.com/301725/

net/ocsp/nss_ocsp.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 "net/ocsp/nss_ocsp.h"
 
 #include <certt.h>
 #include <certdb.h>
 #include <ocsp.h>
 #include <nspr.h>
@@ skipping 265 matching lines @@
   const std::string& http_response_headers() const {
     DCHECK(finished_);
     return response_headers_->raw_headers();
   }
 
   const std::string& http_response_data() const {
     DCHECK(finished_);
     return data_;
   }
 
-  virtual void OnReceivedRedirect(URLRequest* request,
-                                  const RedirectInfo& redirect_info,
-                                  bool* defer_redirect) override {
+  void OnReceivedRedirect(URLRequest* request,
+                          const RedirectInfo& redirect_info,
+                          bool* defer_redirect) override {
     DCHECK_EQ(request_.get(), request);
     DCHECK_EQ(base::MessageLoopForIO::current(), io_loop_);
 
     if (!redirect_info.new_url.SchemeIs("http")) {
       // Prevent redirects to non-HTTP schemes, including HTTPS. This matches
       // the initial check in OCSPServerSession::CreateRequest().
       CancelURLRequest();
     }
   }
 
-  virtual void OnResponseStarted(URLRequest* request) override {
+  void OnResponseStarted(URLRequest* request) override {
     DCHECK_EQ(request_.get(), request);
     DCHECK_EQ(base::MessageLoopForIO::current(), io_loop_);
 
     int bytes_read = 0;
     if (request->status().is_success()) {
       response_code_ = request_->GetResponseCode();
       response_headers_ = request_->response_headers();
       response_headers_->GetMimeType(&response_content_type_);
       request_->Read(buffer_.get(), kRecvBufferSize, &bytes_read);
     }
     OnReadCompleted(request_.get(), bytes_read);
   }
 
-  virtual void OnReadCompleted(URLRequest* request,
-                               int bytes_read) override {
+  void OnReadCompleted(URLRequest* request, int bytes_read) override {
     DCHECK_EQ(request_.get(), request);
     DCHECK_EQ(base::MessageLoopForIO::current(), io_loop_);
 
     do {
       if (!request_->status().is_success() || bytes_read <= 0)
         break;
       data_.append(buffer_->data(), bytes_read);
     } while (request_->Read(buffer_.get(), kRecvBufferSize, &bytes_read));
 
     if (!request_->status().is_io_pending()) {
@@ skipping 27 matching lines @@
         io_loop_ = NULL;
       }
       cv_.Signal();
       Release();  // Balanced with StartURLRequest().
     }
   }
 
  private:
   friend class base::RefCountedThreadSafe<OCSPRequestSession>;
 
-  virtual ~OCSPRequestSession() {
+  ~OCSPRequestSession() override {
     // When this destructor is called, there should be only one thread that has
     // a reference to this object, and so that thread doesn't need to lock
     // |lock_| here.
     DCHECK(!request_);
     DCHECK(!io_loop_);
   }
 
   // Must call this method while holding |lock_|.
   void CancelLocked() {
     lock_.AssertAcquired();
@@ skipping 595 matching lines @@
 void SetURLRequestContextForNSSHttpIO(URLRequestContext* request_context) {
   pthread_mutex_lock(&g_request_context_lock);
   if (request_context) {
     DCHECK(!g_request_context);
   }
   g_request_context = request_context;
   pthread_mutex_unlock(&g_request_context_lock);
 }
 
 }  // namespace net